diff --git a/index.css b/index.css
index ae603566..bfd1ed67 100644
--- a/index.css
+++ b/index.css
@@ -1437,7 +1437,9 @@ div.states .icon-trash-empty,
 div.states .icon-eye,
 div.states .icon-pin,
 div.states .icon-flag-empty,
-div.states .icon-cw {
+div.states .icon-cw,
+div.states .icon-lock,
+div.states .icon-lock-open {
   cursor: pointer;
 }
 
diff --git a/index.html b/index.html
index f4472f74..e05c060e 100644
--- a/index.html
+++ b/index.html
@@ -108,7 +108,7 @@
       }
     </style>
 
-    <link rel="preload" href="index.css?v=1.88.03" as="style" onload="this.onload=null; this.rel='stylesheet'" />
+    <link rel="preload" href="index.css?v=1.89.00" as="style" onload="this.onload=null; this.rel='stylesheet'" />
     <link rel="preload" href="icons.css" as="style" onload="this.onload=null; this.rel='stylesheet'" />
     <link rel="preload" href="libs/jquery-ui.css" as="style" onload="this.onload=null; this.rel='stylesheet'" />
   </head>
@@ -2017,11 +2017,11 @@
             </button>
             <button
               id="regenerateStates"
-              data-tip="Click to select new capitals and regenerate states. Emblems and military forces will be regenerated as well, burgs will remain as they are"
+              data-tip="Click to select new capitals and regenerate unlocked states. Emblems and military forces will be regenerated as well, burgs will remain as they are"
             >
               States
             </button>
-            <button id="regenerateProvinces" data-tip="Click to regenerate provinces. States will remain as they are">
+            <button id="regenerateProvinces" data-tip="Click to regenerate unlocked provinces. States will remain as they are">
               Provinces
             </button>
             <button
@@ -2031,8 +2031,8 @@
               Burgs
             </button>
             <button id="regenerateEmblems" data-tip="Click to regenerate all emblems">Emblems</button>
-            <button id="regenerateReligions" data-tip="Click to regenerate religions">Religions</button>
-            <button id="regenerateCultures" data-tip="Click to regenerate cultures">Cultures</button>
+            <button id="regenerateReligions" data-tip="Click to regenerate unlocked religions">Religions</button>
+            <button id="regenerateCultures" data-tip="Click to regenerate unlocked cultures">Cultures</button>
             <button
               id="regenerateMilitary"
               data-tip="Click to recalculate military forces based on current military options"
@@ -2040,7 +2040,7 @@
               Military
             </button>
             <button id="regenerateIce" data-tip="Click to icebergs and glaciers">Ice</button>
-            <button id="regenerateMarkers" data-tip="Click to regenerate markers">
+            <button id="regenerateMarkers" data-tip="Click to regenerate unlocked markers">
               Markers <i id="configRegenerateMarkers" class="icon-cog" data-tip="Click to set number multiplier"></i>
             </button>
             <button
@@ -7842,10 +7842,10 @@
     <script src="modules/river-generator.js"></script>
     <script src="modules/lakes.js"></script>
     <script src="modules/names-generator.js?v=1.87.14"></script>
-    <script src="modules/cultures-generator.js?v=1.87.14"></script>
-    <script src="modules/burgs-and-states.js?v=1.87.10"></script>
+    <script src="modules/cultures-generator.js?v=1.89.00"></script>
+    <script src="modules/burgs-and-states.js?v=1.89.00"></script>
     <script src="modules/routes-generator.js"></script>
-    <script src="modules/religions-generator.js"></script>
+    <script src="modules/religions-generator.js?v=1.89.00"></script>
     <script src="modules/military-generator.js"></script>
     <script src="modules/markers-generator.js?v=1.87.13"></script>
     <script src="modules/coa-generator.js"></script>
@@ -7865,10 +7865,10 @@
     <script defer src="modules/relief-icons.js"></script>
     <script defer src="modules/ui/style.js"></script>
     <script defer src="modules/ui/editors.js?v=1.87.07"></script>
-    <script defer src="modules/ui/tools.js?v=1.88.05"></script>
+    <script defer src="modules/ui/tools.js?v=1.89.00"></script>
     <script defer src="modules/ui/world-configurator.js"></script>
     <script defer src="modules/ui/heightmap-editor.js?v=1.88.03"></script>
-    <script defer src="modules/ui/provinces-editor.js"></script>
+    <script defer src="modules/ui/provinces-editor.js?v=1.89.00"></script>
     <script defer src="modules/ui/biomes-editor.js"></script>
     <script defer src="modules/ui/namesbase-editor.js?v=1.87.10"></script>
     <script defer src="modules/ui/elevation-profile.js"></script>
diff --git a/modules/burgs-and-states.js b/modules/burgs-and-states.js
index cff34d46..11ce30b8 100644
--- a/modules/burgs-and-states.js
+++ b/modules/burgs-and-states.js
@@ -163,6 +163,144 @@ window.BurgsAndStates = (function () {
     }
   };
 
+  const regenerateStates = function() {
+    const localSeed = generateSeed();
+    Math.random = aleaPRNG(localSeed);
+
+    const statesCount = +regionsOutput.value;
+    const burgs = pack.burgs.filter(b => b.i && !b.removed);
+    if (!burgs.length) return tip("There are no any burgs to generate states. Please create burgs first", false, "error");
+    if (burgs.length < statesCount)
+      tip(`Not enough burgs to generate ${statesCount} states. Will generate only ${burgs.length} states`, false, "warn");
+
+    // turn all old capitals into towns, except for the capitals of locked states
+    burgs
+      .filter(b => b.capital && pack.states.find(s => s.lock && s.capital === b.i) === undefined)
+      .forEach(b => {
+        moveBurgToGroup(b.i, "towns");
+        b.capital = 0;
+      });
+
+    // remove emblems
+    document.querySelectorAll("[id^=stateCOA]").forEach(el => el.remove());
+    document.querySelectorAll("[id^=provinceCOA]").forEach(el => el.remove());
+    emblems.selectAll("use").remove();
+
+    unfog();
+
+    if (!statesCount) {
+      tip(`Cannot generate zero states. Please check the <i>States Number</i> option`, false, "warn");
+      pack.states = pack.states.slice(0, 1); // remove all except of neutrals
+      pack.states[0].diplomacy = []; // clear diplomacy
+      pack.provinces = [0]; // remove all provinces
+      pack.cells.state = new Uint16Array(pack.cells.i.length); // reset cells data
+      borders.selectAll("path").remove(); // remove borders
+      regions.selectAll("path").remove(); // remove states fill
+      labels.select("#states").selectAll("text"); // remove state labels
+      defs.select("#textPaths").selectAll("path[id*='stateLabel']").remove(); // remove state labels paths
+
+      if (document.getElementById("burgsOverviewRefresh").offsetParent) burgsOverviewRefresh.click();
+      if (document.getElementById("statesEditorRefresh").offsetParent) statesEditorRefresh.click();
+      return;
+    }
+
+    // burg local ids sorted by a bit randomized population. Also ignore burgs of a locked state.
+    const sortedBurgs = burgs
+      .filter(b => !pack.states[b.state] || !pack.states[b.state].lock)
+      .map((b, i) => [b, b.population * Math.random()])
+      .sort((a, b) => b[1] - a[1])
+      .map(b => b[0]);
+    const capitalsTree = d3.quadtree();
+
+    const neutral = pack.states[0].name; // neutrals name
+    const count = Math.min(statesCount, burgs.length) + 1; // +1 for neutral
+    let spacing = (graphWidth + graphHeight) / 2 / count; // min distance between capitals
+
+    const states = [];
+    // Get all the states to restore
+    let statesToRestore = [];
+    if (pack.states) {
+      pack.states.forEach(state => {
+        if (!state.lock) return;
+
+        statesToRestore.push(state)
+      });
+    }
+
+    d3.range(count).forEach(i => {
+      if (!i) {
+        states.push({i, name: neutral});
+        return;
+      }
+
+      // If we still have states to restore from the locks, restore those first and assign them the right ids.
+      if (statesToRestore.length) {
+        const [toRestore, ...rest] = statesToRestore;
+
+        toRestore.old_i = toRestore.i;
+        toRestore.i = i;
+        states.push(toRestore);
+
+        // Also reassign the state id of all provinces of this state for locked provinces
+        toRestore.provinces.forEach(id => {
+          if (!pack.provinces[id]) return;
+
+          pack.provinces[id].state = toRestore.i;
+          pack.provinces[id].should_restore = true;
+        });
+
+        statesToRestore = rest;
+
+        const {x, y} = burgs[toRestore.capital];
+        capitalsTree.add([x, y]);
+        return;
+      }
+
+      let capital = null;
+      for (const burg of sortedBurgs) {
+        const {x, y} = burg;
+        if (capitalsTree.find(x, y, spacing) === undefined) {
+          burg.capital = 1;
+          capital = burg;
+          capitalsTree.add([x, y]);
+          moveBurgToGroup(burg.i, "cities");
+          break;
+        }
+
+        spacing = Math.max(spacing - 1, 1);
+      }
+
+      const culture = capital.culture;
+      const basename =
+        capital.name.length < 9 && capital.cell % 5 === 0 ? capital.name : Names.getCulture(culture, 3, 6, "", 0);
+      const name = Names.getState(basename, culture);
+      const nomadic = [1, 2, 3, 4].includes(pack.cells.biome[capital.cell]);
+      const type = nomadic
+        ? "Nomadic"
+        : pack.cultures[culture].type === "Nomadic"
+          ? "Generic"
+          : pack.cultures[culture].type;
+      const expansionism = rn(Math.random() * powerInput.value + 1, 1);
+
+      const cultureType = pack.cultures[culture].type;
+      const coa = COA.generate(capital.coa, 0.3, null, cultureType);
+      coa.shield = capital.coa.shield;
+
+      states.push({
+        i,
+        name,
+        type,
+        capital: capital.i,
+        center: capital.cell,
+        culture,
+        expansionism,
+        coa
+      });
+    });
+
+    pack.states = states;
+  }
+
   // define burg coordinates, coa, port status and define details
   const specifyBurgs = function () {
     TIME && console.time("specifyBurgs");
@@ -364,6 +502,12 @@ window.BurgsAndStates = (function () {
     TIME && console.time("expandStates");
     const {cells, states, cultures, burgs} = pack;
 
+    const prevStates = {};
+    if (cells.state) {
+      cells.state.forEach(function (i, index) {
+        prevStates[index] = i;
+      })
+    }
     cells.state = new Uint16Array(cells.i.length);
     const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
     const cost = [];
@@ -372,6 +516,17 @@ window.BurgsAndStates = (function () {
     states
       .filter(s => s.i && !s.removed)
       .forEach(s => {
+        if (s.lock) {
+          Object.entries(prevStates).forEach(function ([index, stateId]) {
+            if (stateId === s.old_i) {
+              cells.state[index] = s.i;
+              cost[index] = neutral;
+            }
+          });
+
+          return;
+        }
+
         const capitalCell = burgs[s.capital].cell;
         cells.state[capitalCell] = s.i;
         const cultureCenter = cultures[s.culture].center;
@@ -387,6 +542,8 @@ window.BurgsAndStates = (function () {
 
       cells.c[e].forEach(e => {
         if (cells.state[e] && e === states[cells.state[e]].center) return; // do not overwrite capital cells
+        // Do not overwrite cells from a locked state.
+        if (states[cells.state[e]].lock) return;
 
         const cultureCost = culture === cells.culture[e] ? -9 : 100;
         const populationCost = cells.h[e] < 20 ? 0 : cells.s[e] ? Math.max(20 - cells.s[e], 0) : 5000;
@@ -452,10 +609,15 @@ window.BurgsAndStates = (function () {
     for (const i of cells.i) {
       if (cells.h[i] < 20 || cells.burg[i]) continue; // do not overwrite burgs
       if (cells.c[i].some(c => burgs[cells.burg[c]].capital)) continue; // do not overwrite near capital
+      if (pack.states[cells.state[i]]?.lock) continue; // Do not overwrite cells of locks states
       const neibs = cells.c[i].filter(c => cells.h[c] >= 20);
-      const adversaries = neibs.filter(c => cells.state[c] !== cells.state[i]);
+      const adversaries = neibs.filter(
+        c => !pack.states[cells.state[c]]?.lock && cells.state[c] !== cells.state[i]
+      );
       if (adversaries.length < 2) continue;
-      const buddies = neibs.filter(c => cells.state[c] === cells.state[i]);
+      const buddies = neibs.filter(
+        c => !pack.states[cells.state[c]]?.lock && cells.state[c] === cells.state[i]
+      );
       if (buddies.length > 2) continue;
       if (adversaries.length <= buddies.length) continue;
       cells.state[i] = cells.state[adversaries[0]];
@@ -498,7 +660,8 @@ window.BurgsAndStates = (function () {
     const mode = options.stateLabelsMode || "auto";
 
     for (const s of states) {
-      if (!s.i || s.removed || !s.cells || (list && !list.includes(s.i))) continue;
+      if (!s.i || s.removed || s.lock || !s.cells || (list && !list.includes(s.i))) continue;
+
       const used = [];
       const visualCenter = findCell(s.pole[0], s.pole[1]);
       const start = cells.state[visualCenter] === s.i ? visualCenter : s.center;
@@ -600,10 +763,37 @@ window.BurgsAndStates = (function () {
 
       if (!list) {
         // remove all labels and textpaths
-        g.selectAll("text").remove();
-        t.selectAll("path[id*='stateLabel']").remove();
+        g.selectAll("text").filter((_, i) => {
+          const id = g.select(`:nth-child(${i + 1})`).node()?.id;
+          if (!id) return true;
+
+          return !pack.states.some(s => s.lock && `${s.old_i}` === id.substring(10));
+        }).remove();
+        t.selectAll("path[id*='stateLabel']").filter((_, i) => {
+          const id = t.select(`:nth-child(${i + 1})`).node()?.id;
+          if (!id) return true;
+
+          return !pack.states.some(s => s.lock && `${s.old_i}` === id.substring(19));
+        }).remove();
       }
 
+      pack.states.forEach(s => {
+        if (!s.lock) return;
+
+        // For locked states, get the name and update its index to keep it in place
+        const g = labels.select("#states");
+        const t = defs.select("#textPaths");
+
+        const labelNode = g.select(`#stateLabel${s.old_i}`);
+        const textNode = t.select(`#textPath_stateLabel${s.old_i}`);
+
+        labelNode
+          .attr('id', `stateLabel${s.i}`)
+          .select("textPath")
+          .attr("xlink:href", `#textPath_stateLabel${s.i}`);
+        textNode.attr('id', `textPath_stateLabel${s.i}`);
+      });
+
       const example = g.append("text").attr("x", 0).attr("x", 0).text("Average");
       const letterLength = example.node().getComputedTextLength() / 7; // average length of 1 letter
 
@@ -752,7 +942,7 @@ window.BurgsAndStates = (function () {
 
     // assign basic color using greedy coloring algorithm
     pack.states.forEach(s => {
-      if (!s.i || s.removed) return;
+      if (!s.i || s.removed || s.lock) return;
       const neibs = s.neighbors;
       s.color = colors.find(c => neibs.every(n => pack.states[n].color !== c));
       if (!s.color) s.color = getRandomColor();
@@ -761,7 +951,7 @@ window.BurgsAndStates = (function () {
 
     // randomize each already used color a bit
     colors.forEach(c => {
-      const sameColored = pack.states.filter(s => s.color === c);
+      const sameColored = pack.states.filter(s => s.color === c && !s.lock);
       sameColored.forEach((s, d) => {
         if (!d) return;
         s.color = getMixedColor(s.color);
@@ -990,7 +1180,7 @@ window.BurgsAndStates = (function () {
   // select a forms for listed or all valid states
   const defineStateForms = function (list) {
     TIME && console.time("defineStateForms");
-    const states = pack.states.filter(s => s.i && !s.removed);
+    const states = pack.states.filter(s => s.i && !s.removed && !s.lock);
     if (states.length < 1) return;
 
     const generic = {Monarchy: 25, Republic: 2, Union: 1};
@@ -1142,13 +1332,26 @@ window.BurgsAndStates = (function () {
     return adjName ? `${getAdjective(s.name)} ${s.formName}` : `${s.formName} of ${s.name}`;
   };
 
-  const generateProvinces = function (regenerate) {
+  const generateProvinces = function (
+      regenerate = false,
+      ignoreLockedStates = false
+  ) {
     TIME && console.time("generateProvinces");
     const localSeed = regenerate ? generateSeed() : seed;
     Math.random = aleaPRNG(localSeed);
 
     const {cells, states, burgs} = pack;
-    const provinces = (pack.provinces = [0]);
+    const provincesToRestore = pack.provinces ?
+      pack.provinces.filter(p => p.lock || p.should_restore)
+      : [];
+    const provinces = (pack.provinces = [0].concat(...provincesToRestore));
+
+    const prevProvinces = {};
+    if (cells.province) {
+      cells.province.forEach((i, index) => {
+        prevProvinces[index] = i;
+      })
+    }
     cells.province = new Uint16Array(cells.i.length); // cell state
     const percentage = +provincesInput.value;
 
@@ -1170,10 +1373,16 @@ window.BurgsAndStates = (function () {
 
     // generate provinces for a selected burgs
     states.forEach(s => {
-      s.provinces = [];
+      s.provinces = s.provinces ? s.provinces.filter(p => p.lock) : [];
+      // Don't regenerate provinces of a locked state
+      if (!ignoreLockedStates && s.lock) return;
+
       if (!s.i || s.removed) return;
       const stateBurgs = burgs
-        .filter(b => b.state === s.i && !b.removed)
+        // Filter for burgs of this state that haven't been removed and that are not in a locked province.
+        .filter(b =>
+          b.state === s.i && !b.removed && provincesToRestore.find(p => prevProvinces[b.cell] === p.i) === undefined
+        )
         .sort((a, b) => b.population * gauss(1, 0.2, 0.5, 1.5, 3) - a.population)
         .sort((a, b) => b.capital - a.capital);
       if (stateBurgs.length < 2) return; // at least 2 provinces are required
@@ -1200,11 +1409,32 @@ window.BurgsAndStates = (function () {
       }
     });
 
+    // Restore the indexes of locked and kept provinces
+    provincesToRestore.forEach((province, index) => {
+      delete province.should_restore;
+      province.old_i = province.i;
+      province.i = index + 1;
+      states[province.state].provinces.push(province.i);
+    });
+
     // expand generated provinces
     const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
     const cost = [];
     provinces.forEach(function (p) {
       if (!p.i || p.removed) return;
+
+      // Then restore the cells of locked or kept provinces
+      if (p.old_i) {
+        Object.entries(prevProvinces).forEach(function ([index, provId]) {
+          if (provId === p.old_i) {
+            cells.province[index] = p.i;
+          }
+        });
+
+        delete p.old_i;
+        return;
+      }
+
       cells.province[p.center] = p.i;
       queue.queue({e: p.center, p: 0, province: p.i, state: p.state});
       cost[p.center] = 1;
@@ -1217,6 +1447,20 @@ window.BurgsAndStates = (function () {
         province = next.province,
         state = next.state;
       cells.c[n].forEach(function (e) {
+        // Do not overwrite cells from a locked state or province.
+        if (
+          (provinces[cells.province[e]] && provinces[cells.province[e]].lock) ||
+          (
+            // For finding if the state is locked, first make sure we care about that
+            // then find the province, the state for the province, and if both are defined,
+            // check the lock.
+            !ignoreLockedStates &&
+            provinces[cells.province[e]] &&
+            states[provinces[cells.province[e]].state] &&
+            states[provinces[cells.province[e]].state].lock
+          )
+        ) return;
+
         const land = cells.h[e] >= 20;
         if (!land && !cells.t[e]) return; // cannot pass deep ocean
         if (land && cells.state[e] !== state) return;
@@ -1235,7 +1479,18 @@ window.BurgsAndStates = (function () {
     // justify provinces shapes a bit
     for (const i of cells.i) {
       if (cells.burg[i]) continue; // do not overwrite burgs
-      const neibs = cells.c[i].filter(c => cells.state[c] === cells.state[i]).map(c => cells.province[c]);
+      // Do not process any locked provinces or states, if we care about the latter
+      if (
+          pack.provinces[cells.province[i]].lock ||
+          (!ignoreLockedStates && pack.states[cells.state[i]].lock)
+      ) continue;
+      // Find neighbors, but ignore any cells from locked states or provinces
+      const neibs = cells.c[i].filter(
+        c =>
+          (ignoreLockedStates || !pack.states[cells.state[c]].lock) &&
+          !pack.provinces[cells.province[c]].lock &&
+          cells.state[c] === cells.state[i]
+      ).map(c => cells.province[c]);
       const adversaries = neibs.filter(c => c !== cells.province[i]);
       if (adversaries.length < 2) continue;
       const buddies = neibs.filter(c => c === cells.province[i]).length;
@@ -1249,7 +1504,7 @@ window.BurgsAndStates = (function () {
     // add "wild" provinces if some cells don't have a province assigned
     const noProvince = Array.from(cells.i).filter(i => cells.state[i] && !cells.province[i]); // cells without province assigned
     states.forEach(s => {
-      if (!s.provinces.length) return;
+      if (!s.provinces.length || (!ignoreLockedStates && s.lock)) return;
 
       const coreProvinceNames = s.provinces.map(p => provinces[p]?.name);
       const colonyNamePool = [s.name, ...coreProvinceNames].filter(name => name && !/new/i.test(name));
@@ -1358,6 +1613,7 @@ window.BurgsAndStates = (function () {
 
   return {
     generate,
+    regenerateStates,
     expandStates,
     normalizeStates,
     assignColors,
diff --git a/modules/cultures-generator.js b/modules/cultures-generator.js
index 8a804210..e09d4cdd 100644
--- a/modules/cultures-generator.js
+++ b/modules/cultures-generator.js
@@ -6,6 +6,12 @@ window.Cultures = (function () {
   const generate = function () {
     TIME && console.time("generateCultures");
     cells = pack.cells;
+    const prevCultures = {};
+    if (cells.culture) {
+      cells.culture.forEach(function (cultureId, index) {
+        prevCultures[index] = cultureId;
+      })
+    }
     cells.culture = new Uint16Array(cells.i.length); // cell cultures
     let count = Math.min(+culturesInput.value, +culturesSet.selectedOptions[0].dataset.max);
 
@@ -51,7 +57,29 @@ window.Cultures = (function () {
     const emblemShape = document.getElementById("emblemShape").value;
 
     const codes = [];
+    let unoccupied = [...populated];
     cultures.forEach(function (c, i) {
+      if (c.lock) {
+        centers.add(c.center);
+        cells.culture[c.center] = i + 1;
+        codes.push(c.code);
+
+        const cultureCells = [];
+        Object.entries(prevCultures).forEach(function ([index, cultureId]) {
+          if (cultureId === c.i) {
+            cells.culture[index] = i + 1;
+            cultureCells.push(parseInt(index));
+          }
+        });
+
+        unoccupied = unoccupied.filter(function (cell) {
+          return !cultureCells.includes(cell);
+        });
+
+        c.i = i + 1;
+        return;
+      }
+
       const cell = (c.center = placeCenter(c.sort ? c.sort : i => cells.s[i]));
       centers.add(cells.p[cell]);
       c.i = i + 1;
@@ -70,12 +98,16 @@ window.Cultures = (function () {
     function placeCenter(v) {
       let c,
         spacing = (graphWidth + graphHeight) / 2 / count;
-      const sorted = [...populated].sort((a, b) => v(b) - v(a)),
+      // Only use cells where there are no culture already on that cell, which may happen if a locked culture
+      // was restored. We can be sure that locked cultures will always be first in the list.
+      const sorted = [...unoccupied].sort((a, b) => v(b) - v(a)),
         max = Math.floor(sorted.length / 2);
       do {
         c = sorted[biased(0, max, 5)];
         spacing *= 0.9;
-      } while (centers.find(cells.p[c][0], cells.p[c][1], spacing) !== undefined);
+      } while (
+        centers.find(cells.p[c][0], cells.p[c][1], spacing) !== undefined
+      );
       return c;
     }
 
@@ -98,6 +130,12 @@ window.Cultures = (function () {
       const count = Math.min(c, def.length);
       const cultures = [];
 
+      if (pack.cultures) {
+        pack.cultures.forEach(function (culture) {
+          if (culture.lock) cultures.push(culture);
+        });
+      }
+
       for (let culture, rnd, i = 0; cultures.length < count && i < 200; i++) {
         do {
           rnd = rand(def.length - 1);
@@ -481,7 +519,7 @@ window.Cultures = (function () {
 
     const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
     pack.cultures.forEach(function (c) {
-      if (!c.i || c.removed) return;
+      if (!c.i || c.removed || c.lock) return;
       queue.queue({e: c.center, p: 0, c: c.i});
     });
 
@@ -494,6 +532,8 @@ window.Cultures = (function () {
         c = next.c;
       const type = pack.cultures[c].type;
       cells.c[n].forEach(function (e) {
+        if (pack.cultures[cells.culture[e]]?.lock) return;
+
         const biome = cells.biome[e];
         const biomeCost = getBiomeCost(c, biome, type);
         const biomeChangeCost = biome === cells.biome[n] ? 0 : 20; // penalty on biome change
diff --git a/modules/dynamic/editors/cultures-editor.js b/modules/dynamic/editors/cultures-editor.js
index 393967bc..8cc01007 100644
--- a/modules/dynamic/editors/cultures-editor.js
+++ b/modules/dynamic/editors/cultures-editor.js
@@ -228,6 +228,7 @@ function culturesEditorAddLines() {
           style="width: 5em">${si(population)}</div>
         <span data-tip="Click to re-generate names for burgs with this culture assigned" class="icon-arrows-cw hide"></span>
         ${getShapeOptions(selectShape, c.shield)}
+        <span data-tip="Lock culture" class="icon-lock${c.lock ? '' : '-open'} hide"></span>
         <span data-tip="Remove culture" class="icon-trash-empty hide"></span>
       </div>`;
   }
@@ -257,6 +258,8 @@ function culturesEditorAddLines() {
   $body.querySelectorAll("div > div.culturePopulation").forEach($el => $el.on("click", changePopulation));
   $body.querySelectorAll("div > span.icon-arrows-cw").forEach($el => $el.on("click", cultureRegenerateBurgs));
   $body.querySelectorAll("div > span.icon-trash-empty").forEach($el => $el.on("click", cultureRemovePrompt));
+  $body.querySelectorAll("div > span.icon-lock").forEach($el => $el.on("click", updateLockStatus));
+  $body.querySelectorAll("div > span.icon-lock-open").forEach($el => $el.on("click", updateLockStatus));
 
   const $culturesHeader = byId("culturesHeader");
   $culturesHeader.querySelector("div[data-sortby='emblems']").style.display = selectShape ? "inline-block" : "none";
@@ -928,3 +931,15 @@ async function uploadCulturesData() {
   drawCultures();
   refreshCulturesEditor();
 }
+
+function updateLockStatus() {
+  if (customization) return;
+
+  const cultureId = +this.parentNode.dataset.id;
+  const classList = this.classList;
+  const c = pack.cultures[cultureId];
+  c.lock = !c.lock;
+
+  classList.toggle("icon-lock-open");
+  classList.toggle("icon-lock");
+}
diff --git a/modules/dynamic/editors/religions-editor.js b/modules/dynamic/editors/religions-editor.js
index a76aec30..da6c290d 100644
--- a/modules/dynamic/editors/religions-editor.js
+++ b/modules/dynamic/editors/religions-editor.js
@@ -212,6 +212,10 @@ function religionsEditorAddLines() {
       <div data-tip="Religion area" class="religionArea hide" style="width: 5em">${si(area) + unit}</div>
       <span data-tip="${populationTip}" class="icon-male hide"></span>
       <div data-tip="${populationTip}" class="religionPopulation hide pointer">${si(population)}</div>
+      <span
+        data-tip="Lock religion, will regenerate the origin folk and organized religion if they are not also locked"
+        class="icon-lock${r.lock ? '' : '-open'} hide"
+      ></span>
       <span data-tip="Remove religion" class="icon-trash-empty hide"></span>
     </div>`;
   }
@@ -242,6 +246,8 @@ function religionsEditorAddLines() {
   $body.querySelectorAll("div > span.icon-arrows-cw").forEach(el => el.on("click", regenerateDeity));
   $body.querySelectorAll("div > div.religionPopulation").forEach(el => el.on("click", changePopulation));
   $body.querySelectorAll("div > span.icon-trash-empty").forEach(el => el.on("click", religionRemovePrompt));
+  $body.querySelectorAll("div > span.icon-lock").forEach($el => $el.on("click", updateLockStatus));
+  $body.querySelectorAll("div > span.icon-lock-open").forEach($el => $el.on("click", updateLockStatus));
 
   if ($body.dataset.type === "percentage") {
     $body.dataset.type = "absolute";
@@ -755,3 +761,15 @@ function closeReligionsEditor() {
   exitReligionsManualAssignment("close");
   exitAddReligionMode();
 }
+
+function updateLockStatus() {
+  if (customization) return;
+
+  const religionId = +this.parentNode.dataset.id;
+  const classList = this.classList;
+  const r = pack.religions[religionId];
+  r.lock = !r.lock;
+
+  classList.toggle("icon-lock-open");
+  classList.toggle("icon-lock");
+}
diff --git a/modules/dynamic/editors/states-editor.js b/modules/dynamic/editors/states-editor.js
index b16246fd..85705b9d 100644
--- a/modules/dynamic/editors/states-editor.js
+++ b/modules/dynamic/editors/states-editor.js
@@ -153,6 +153,7 @@ function addListeners() {
     else if (classList.contains("statePopulation")) changePopulation(stateId);
     else if (classList.contains("icon-pin")) toggleFog(stateId, classList);
     else if (classList.contains("icon-trash-empty")) stateRemovePrompt(stateId);
+    else if (classList.contains("icon-lock") || classList.contains("icon-lock-open")) updateLockStatus(stateId, classList);
   });
 
   $body.on("input", function (ev) {
@@ -288,6 +289,7 @@ function statesEditorAddLines() {
       <span data-tip="Cells count" class="icon-check-empty ${hidden} show hide"></span>
       <div data-tip="Cells count" class="stateCells ${hidden} show hide">${s.cells}</div>
       <span data-tip="Toggle state focus" class="icon-pin ${focused ? "" : " inactive"} hide"></span>
+      <span data-tip="Lock the state" class="icon-lock${s.lock ? '' : '-open'} hide"></span>
       <span data-tip="Remove the state" class="icon-trash-empty hide"></span>
     </div>`;
   }
@@ -1362,3 +1364,11 @@ function closeStatesEditor() {
   debug.selectAll(".highlight").remove();
   $body.innerHTML = "";
 }
+
+function updateLockStatus(stateId, classList) {
+  const s = pack.states[stateId];
+  s.lock = !s.lock;
+
+  classList.toggle("icon-lock-open");
+  classList.toggle("icon-lock");
+}
diff --git a/modules/religions-generator.js b/modules/religions-generator.js
index b7b3464c..d2ea9c0e 100644
--- a/modules/religions-generator.js
+++ b/modules/religions-generator.js
@@ -347,11 +347,62 @@ window.Religions = (function () {
     const cells = pack.cells,
       states = pack.states,
       cultures = pack.cultures;
-    const religions = (pack.religions = []);
+
+    // Keep a map of the previous religions per cell for referencing when we restore locked religions
+    const prevReligions = {};
+    if (cells.religion) {
+      cells.religion.forEach((rId, index) => {
+        prevReligions[index] = rId;
+      })
+    }
     cells.religion = new Uint16Array(cells.culture); // cell religion; initially based on culture
 
+    const religionsToRestore = [];
+    const folkToRestore = [];
+    const restoredCells = [];
+    const restoredHeresyCells = [];
+    // Restore locked religions to their existing cells
+    if (pack.religions) {
+      pack.religions.forEach( (religion) => {
+        // Keep any locked religions, we will reassign it to a folk or organized religion later
+        if (!religion.lock) return;
+
+        // Add all religions we restore after the base cults to keep the index correct
+        // Keep folk religion at the same index since we should restore them during the culture parsing
+        const id = religion.type === 'Folk' ? religion.i : pack.cultures.length + religionsToRestore.length;
+
+        Object.entries(prevReligions).forEach(([index, rId]) => {
+          if (rId !== religion.i) return;
+
+          if (religion.type === "Heresy") {
+            restoredHeresyCells.push(parseInt(index));
+            religion.old_i = religion.i;
+          } else {
+            restoredCells.push(parseInt(index));
+            cells.religion[index] = id;
+          }
+        });
+
+        if (religion.type === 'Folk') {
+          folkToRestore.push(religion);
+        } else {
+          religionsToRestore.push(religion);
+          religion.i = id;
+        }
+      });
+    }
+    const religions = (pack.religions = []);
+
     // add folk religions
     pack.cultures.forEach(c => {
+      // If a restored religion exists for this culture, move it to this position
+      const existingFolkReligion = folkToRestore.find(r => r.culture === c.i);
+      if (existingFolkReligion !== undefined) {
+        religions.push(existingFolkReligion);
+        return;
+      }
+
+      // We already preadded the "no religion" religion
       if (!c.i) return religions.push({i: 0, name: "No religion"});
 
       if (c.removed) {
@@ -370,6 +421,7 @@ window.Religions = (function () {
       const color = getMixedColor(c.color, 0.1, 0); // `url(#hatch${rand(8,13)})`;
       religions.push({i: c.i, name, color, culture: c.i, type: "Folk", form, deity, center: c.center, origins: [0]});
     });
+    religions.push(...religionsToRestore);
 
     if (religionsInput.value == 0 || pack.cultures.length < 2)
       return religions.filter(r => r.i).forEach(r => (r.code = abbreviate(r.name)));
@@ -379,6 +431,7 @@ window.Religions = (function () {
       burgs.length > +religionsInput.value
         ? burgs.sort((a, b) => b.population - a.population).map(b => b.cell)
         : cells.i.filter(i => cells.s[i] > 2).sort((a, b) => cells.s[b] - cells.s[a]);
+    const available = [...sorted].filter(cellI => !restoredCells.includes(cellI));
     const religionsTree = d3.quadtree();
     const spacing = (graphWidth + graphHeight) / 6 / religionsInput.value; // base min distance between towns
     const cultsCount = Math.floor((rand(10, 40) / 100) * religionsInput.value);
@@ -391,9 +444,35 @@ window.Religions = (function () {
       return religions.length ? religions.slice(0, max) : [0];
     }
 
+    // Restore the origins of any organized religion that was locked
+    pack.religions.forEach(religion => {
+      // Ignore if the religion is not locked or not organized
+      if (religion.type !== "Organized" || !religion.lock) return;
+      // Ignore if the religion already has a valid origin
+      if (pack.religions.find(r => r.i !== religion.i && religion.origins.includes(r.i) && r.lock) !== undefined)
+        return;
+
+      // Select a random folk religion for the religion
+      const culture = cells.culture[religion.center];
+      const [x, y] = cells.p[religion.center];
+      const isFolkBased = religion.expansion === "culture" || P(0.5);
+      const folk = isFolkBased && religions.find(r => r.i !== religion.i && r.culture === culture && r.type === "Folk");
+      if (folk && religion.expansion === "culture" && folk.name.slice(0, 3) !== "Old") folk.name = "Old " + folk.name;
+
+      // have a counter here to adjust the search range and make sure we can find a religion
+      let runs = 1;
+      do {
+        // Run the search until we have at least one source religion that is not the current religion.
+        religion.origins = folk ? [folk.i] : getReligionsInRadius({x, y, r: (150 * runs) / count, max: 2})
+          .filter(r => r !== religion.i);
+        runs++;
+      } while (!religion.origins.length)
+      religionsTree.add([x, y]);
+    });
+
     // generate organized religions
     for (let i = 0; religions.length < count && i < 1000; i++) {
-      let center = sorted[biased(0, sorted.length - 1, 5)]; // religion center
+      let center = available[biased(0, available.length - 1, 5)]; // religion center
       const form = rw(forms.Organized);
       const state = cells.state[center];
       const culture = cells.culture[center];
@@ -439,10 +518,30 @@ window.Religions = (function () {
       religionsTree.add([x, y]);
     }
 
+    // Restore the origins of any cult that was locked
+    pack.religions.forEach(religion => {
+      // Ignore if the religion is not locked or not organized
+      if (religion.type !== "Cult" || !religion.lock) return;
+      // Ignore if the religion already has a valid origin
+      if (pack.religions.find(r => r.i !== religion.i && religion.origins.includes(r.i) && r.lock) !== undefined)
+        return;
+
+      const [x, y] = cells.p[religion.center];
+      // have a counter here to adjust the search range and make sure we can find a religion
+      let runs = 1;
+      do {
+        // Run the search until we have at least one source religion that is not the current religion.
+        religion.origins = getReligionsInRadius({x, y, r: (300 * runs) / count, max: rand(0, 4)})
+          .filter(r => r !== religion.i);
+        runs++;
+      } while (!religion.origins.length)
+      religionsTree.add([x, y]);
+    });
+
     // generate cults
     for (let i = 0; religions.length < count + cultsCount && i < 1000; i++) {
       const form = rw(forms.Cult);
-      let center = sorted[biased(0, sorted.length - 1, 1)]; // religion center
+      let center = available[biased(0, available.length - 1, 1)]; // religion center
       if (!cells.burg[center] && cells.c[center].some(c => cells.burg[c]))
         center = cells.c[center].find(c => cells.burg[c]);
       const [x, y] = cells.p[center];
@@ -473,7 +572,32 @@ window.Religions = (function () {
       religionsTree.add([x, y]);
     }
 
-    expandReligions();
+    expandReligions(restoredCells);
+
+    // Restore the origins of any heresy that was locked
+    pack.religions.forEach(religion => {
+      // Ignore if the religion is not locked or not organized
+      if (religion.type !== "Heresy" || !religion.lock) return;
+
+      const originReligion = cells.religion[religion.center];
+      // Restore the cells now that all other religions have been processed
+      Object.entries(prevReligions).forEach(([index, rId]) => {
+        if (rId !== religion.old_i) return;
+
+        cells.religion[parseInt(index)] = religion.i;
+      });
+
+      delete religion.old_i;
+
+      // Ignore if the religion already has a valid origin
+      if (pack.religions.find(r => r.i !== religion.i && religion.origins.includes(r.i) && r.lock) !== undefined)
+        return;
+
+      const [x, y] = cells.p[religion.center];
+      // Use the religion from the expanded cells, we'll restore the heresies later
+      religion.origins = [originReligion];
+      religionsTree.add([x, y]);
+    });
 
     // generate heresies
     religions
@@ -512,7 +636,7 @@ window.Religions = (function () {
         }
       });
 
-    expandHeresies();
+    expandHeresies([...restoredCells, ...restoredHeresyCells]);
     checkCenters();
 
     TIME && console.timeEnd("generateReligions");
@@ -567,14 +691,14 @@ window.Religions = (function () {
   };
 
   // growth algorithm to assign cells to religions
-  const expandReligions = function () {
+  const expandReligions = function (restoredCells) {
     const cells = pack.cells,
       religions = pack.religions;
     const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
     const cost = [];
 
     religions
-      .filter(r => r.type === "Organized" || r.type === "Cult")
+      .filter(r => !r.lock && (r.type === "Organized" || r.type === "Cult"))
       .forEach(r => {
         cells.religion[r.center] = r.i;
         queue.queue({e: r.center, p: 0, r: r.i, s: cells.state[r.center], c: r.culture});
@@ -596,6 +720,7 @@ window.Religions = (function () {
       cells.c[n].forEach(function (e) {
         if (expansion === "culture" && c !== cells.culture[e]) return;
         if (expansion === "state" && s !== cells.state[e]) return;
+        if (restoredCells.includes(e)) return;
 
         const cultureCost = c !== cells.culture[e] ? 10 : 0;
         const stateCost = s !== cells.state[e] ? 10 : 0;
@@ -618,14 +743,14 @@ window.Religions = (function () {
   };
 
   // growth algorithm to assign cells to heresies
-  const expandHeresies = function () {
+  const expandHeresies = function (restoredCells) {
     const cells = pack.cells,
       religions = pack.religions;
     const queue = new PriorityQueue({comparator: (a, b) => a.p - b.p});
     const cost = [];
 
     religions
-      .filter(r => r.type === "Heresy")
+      .filter(r => !r.lock && r.type === "Heresy")
       .forEach(r => {
         const b = cells.religion[r.center]; // "base" religion id
         cells.religion[r.center] = r.i; // heresy id
@@ -643,6 +768,8 @@ window.Religions = (function () {
         b = next.b;
 
       cells.c[n].forEach(function (e) {
+        if (restoredCells.includes(e)) return;
+
         const religionCost = cells.religion[e] === b ? 0 : 2000;
         const biomeCost = cells.road[e] ? 0 : biomesData.cost[cells.biome[e]];
         const heightCost = Math.max(cells.h[e], 20) - 20;
diff --git a/modules/ui/provinces-editor.js b/modules/ui/provinces-editor.js
index 3cac626f..f3c7660f 100644
--- a/modules/ui/provinces-editor.js
+++ b/modules/ui/provinces-editor.js
@@ -53,6 +53,7 @@ function editProvinces() {
     else if (cl.contains("culturePopulation")) changePopulation(p);
     else if (cl.contains("icon-pin")) toggleFog(p, cl);
     else if (cl.contains("icon-trash-empty")) removeProvince(p);
+    else if (cl.contains("icon-lock") || cl.contains("icon-lock-open")) updateLockStatus(p, cl);
   });
 
   body.addEventListener("change", function (ev) {
@@ -163,6 +164,7 @@ function editProvinces() {
           class="icon-flag-empty ${separable ? "" : "placeholder"} hide"
         ></span>
         <span data-tip="Toggle province focus" class="icon-pin ${focused ? "" : " inactive"} hide"></span>
+        <span data-tip="Lock the province" class="icon-lock${p.lock ? '' : '-open'} hide"></span>
         <span data-tip="Remove the province" class="icon-trash-empty hide"></span>
       </div>`;
     }
@@ -1086,3 +1088,11 @@ function editProvinces() {
     if (customization === 12) exitAddProvinceMode();
   }
 }
+
+function updateLockStatus(provinceId, classList) {
+  const p = pack.provinces[provinceId];
+  p.lock = !p.lock;
+
+  classList.toggle("icon-lock-open");
+  classList.toggle("icon-lock");
+}
diff --git a/modules/ui/tools.js b/modules/ui/tools.js
index b4a6e162..46e3195f 100644
--- a/modules/ui/tools.js
+++ b/modules/ui/tools.js
@@ -138,93 +138,7 @@ function recalculatePopulation() {
 }
 
 function regenerateStates() {
-  const localSeed = generateSeed();
-  Math.random = aleaPRNG(localSeed);
-
-  const statesCount = +regionsOutput.value;
-  const burgs = pack.burgs.filter(b => b.i && !b.removed);
-  if (!burgs.length) return tip("There are no any burgs to generate states. Please create burgs first", false, "error");
-  if (burgs.length < statesCount)
-    tip(`Not enough burgs to generate ${statesCount} states. Will generate only ${burgs.length} states`, false, "warn");
-
-  // turn all old capitals into towns
-  burgs
-    .filter(b => b.capital)
-    .forEach(b => {
-      moveBurgToGroup(b.i, "towns");
-      b.capital = 0;
-    });
-
-  // remove emblems
-  document.querySelectorAll("[id^=stateCOA]").forEach(el => el.remove());
-  document.querySelectorAll("[id^=provinceCOA]").forEach(el => el.remove());
-  emblems.selectAll("use").remove();
-
-  unfog();
-
-  if (!statesCount) {
-    tip(`Cannot generate zero states. Please check the <i>States Number</i> option`, false, "warn");
-    pack.states = pack.states.slice(0, 1); // remove all except of neutrals
-    pack.states[0].diplomacy = []; // clear diplomacy
-    pack.provinces = [0]; // remove all provinces
-    pack.cells.state = new Uint16Array(pack.cells.i.length); // reset cells data
-    borders.selectAll("path").remove(); // remove borders
-    regions.selectAll("path").remove(); // remove states fill
-    labels.select("#states").selectAll("text"); // remove state labels
-    defs.select("#textPaths").selectAll("path[id*='stateLabel']").remove(); // remove state labels paths
-
-    if (document.getElementById("burgsOverviewRefresh").offsetParent) burgsOverviewRefresh.click();
-    if (document.getElementById("statesEditorRefresh").offsetParent) statesEditorRefresh.click();
-    return;
-  }
-
-  // burg local ids sorted by a bit randomized population:
-  const sortedBurgs = burgs
-    .map((b, i) => [b, b.population * Math.random()])
-    .sort((a, b) => b[1] - a[1])
-    .map(b => b[0]);
-  const capitalsTree = d3.quadtree();
-
-  const neutral = pack.states[0].name; // neutrals name
-  const count = Math.min(statesCount, burgs.length) + 1; // +1 for neutral
-  let spacing = (graphWidth + graphHeight) / 2 / count; // min distance between capitals
-
-  pack.states = d3.range(count).map(i => {
-    if (!i) return {i, name: neutral};
-
-    let capital = null;
-    for (const burg of sortedBurgs) {
-      const {x, y} = burg;
-      if (capitalsTree.find(x, y, spacing) === undefined) {
-        burg.capital = 1;
-        capital = burg;
-        capitalsTree.add([x, y]);
-        moveBurgToGroup(burg.i, "cities");
-        break;
-      }
-
-      spacing = Math.max(spacing - 1, 1);
-    }
-
-    const culture = capital.culture;
-    const basename =
-      capital.name.length < 9 && capital.cell % 5 === 0 ? capital.name : Names.getCulture(culture, 3, 6, "", 0);
-    const name = Names.getState(basename, culture);
-    const nomadic = [1, 2, 3, 4].includes(pack.cells.biome[capital.cell]);
-    const type = nomadic
-      ? "Nomadic"
-      : pack.cultures[culture].type === "Nomadic"
-      ? "Generic"
-      : pack.cultures[culture].type;
-    const expansionism = rn(Math.random() * powerInput.value + 1, 1);
-
-    const cultureType = pack.cultures[culture].type;
-    const coa = COA.generate(capital.coa, 0.3, null, cultureType);
-    coa.shield = capital.coa.shield;
-
-    return {i, name, type, capital: capital.i, center: capital.cell, culture, expansionism, coa};
-  });
-
+  BurgsAndStates.regenerateStates();
   BurgsAndStates.expandStates();
   BurgsAndStates.normalizeStates();
   BurgsAndStates.collectStatistics();
@@ -249,7 +163,7 @@ function regenerateStates() {
 function regenerateProvinces() {
   unfog();
 
-  BurgsAndStates.generateProvinces(true);
+  BurgsAndStates.generateProvinces(true, true);
   drawBorders();
   if (layerIsOn("toggleProvinces")) drawProvinces();
 
@@ -257,6 +171,7 @@ function regenerateProvinces() {
   document.querySelectorAll("[id^=provinceCOA]").forEach(el => el.remove());
   emblems.selectAll("use").remove();
   if (layerIsOn("toggleEmblems")) drawEmblems();
+  refreshAllEditors();
 }
 
 function regenerateBurgs() {
@@ -403,6 +318,7 @@ function regenerateReligions() {
   Religions.generate();
   if (!layerIsOn("toggleReligions")) toggleReligions();
   else drawReligions();
+  refreshAllEditors();
 }
 
 function regenerateCultures() {
diff --git a/versioning.js b/versioning.js
index 959a3fa8..87a04f2d 100644
--- a/versioning.js
+++ b/versioning.js
@@ -1,7 +1,7 @@
 "use strict";
 
 // version and caching control
-const version = "1.88.05"; // generator version, update each time
+const version = "1.89.00"; // generator version, update each time
 
 {
   document.title += " v" + version;
@@ -28,6 +28,7 @@ const version = "1.88.05"; // generator version, update each time
 
       <ul>
         <strong>Latest changes:</strong>
+        <li>Can now lock states, provinces, cultures, and religions from being regenerated</li>
         <li>Heightmap brushes: linear edit option</li>
         <li>Data Charts screen</li>
         <li>Сultures and religions can have multiple parents in hierarchy tree</li>