diff --git a/BauSystem_Main/src/de/steamwar/bausystem/region/GlobalRegion.java b/BauSystem_Main/src/de/steamwar/bausystem/region/GlobalRegion.java
index 5f236e85..b6ce36db 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/region/GlobalRegion.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/region/GlobalRegion.java
@@ -31,7 +31,7 @@ public class GlobalRegion extends Region {
     static GlobalRegion instance;
 
     public GlobalRegion(FlagStorage flagStorage, YAPIONObject regionData) {
-        super(null, new YAPIONObject(), flagStorage, regionData);
+        super("global", null, new YAPIONObject(), flagStorage, regionData);
 
         instance = this;
     }
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/region/Prototype.java b/BauSystem_Main/src/de/steamwar/bausystem/region/Prototype.java
index 31ce8786..2722bf18 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/region/Prototype.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/region/Prototype.java
@@ -137,7 +137,7 @@ public class Prototype {
         }
     }
 
-    public static Region generateRegion(YAPIONObject regionConfig, YAPIONObject regionData) {
+    public static Region generateRegion(String name, YAPIONObject regionConfig, YAPIONObject regionData) {
         Prototype prototype;
         if (regionData.containsKey("prototype", String.class)) {
             prototype = PROTOTYPE_MAP.get(regionData.getPlainValue("prototype"));
@@ -150,7 +150,7 @@ public class Prototype {
         } else {
             flagStorage = new FlagStorage();
         }
-        return new Region(prototype, regionConfig, flagStorage, regionData);
+        return new Region(name, prototype, regionConfig, flagStorage, regionData);
     }
 
 }
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java b/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java
index c858a71e..b6737917 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java
@@ -36,6 +36,7 @@ import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.function.Consumer;
 
 @Getter
 public class Region {
@@ -53,6 +54,7 @@ public class Region {
 
     private YAPIONObject regionData;
 
+    private String name;
     private Prototype prototype;
     private Set<Prototype> prototypes;
 
@@ -71,6 +73,7 @@ public class Region {
     private Point minPointBuildExtension;
     private Point maxPointBuildExtension;
 
+    private String linkedRegionName = null; // Nullable
     private Region linkedRegion = null; // Nullable
 
     private FlagStorage flagStorage;
@@ -78,12 +81,17 @@ public class Region {
     private SizedStack<EditSession> undoSessions;
     private SizedStack<EditSession> redoSessions;
 
-    public Region(Prototype prototype, YAPIONObject regionConfig, FlagStorage flagStorage, YAPIONObject regionData) {
+    public Region(String name, Prototype prototype, YAPIONObject regionConfig, FlagStorage flagStorage, YAPIONObject regionData) {
+        this.name = name;
         this.regionData = regionData;
         if (prototype != null) {
             REGION_LIST.add(this);
         }
 
+        if (regionConfig.containsKey("linkedWith")) {
+            linkedRegionName = regionConfig.getPlainValue("linkedWith");
+        }
+
         prototypes = new HashSet<>();
         if (regionConfig.containsKey("prototypes", YAPIONType.ARRAY)) {
             regionConfig.getArray("prototypes").forEach(yapionAnyType -> {
@@ -171,18 +179,40 @@ public class Region {
         return prototype != null ? prototype.getDisplayName() : "";
     }
 
+    private void setLinkedRegion(Consumer<Region> regionConsumer) {
+        if (linkedRegionName == null) {
+            return;
+        }
+        if (linkedRegion != null) {
+            regionConsumer.accept(linkedRegion);
+            return;
+        }
+        for (Region region : REGION_LIST) {
+            if (region.name.equals(name)) {
+                linkedRegion = region;
+                regionConsumer.accept(linkedRegion);
+                return;
+            }
+        }
+    }
+
     public void setPrototype(@NonNull Prototype prototype) {
         if (this.prototype == null) {
             return;
         }
         regionData.add("prototype", prototype.getName());
         generatePrototypeData(prototype, minPoint);
+        setLinkedRegion(region -> {
+            region.regionData.add("prototype", prototype.getName());
+            region.generatePrototypeData(prototype, region.minPoint);
+        });
     }
 
     public void set(Flag flagType, Flag.Value<?> value) {
         if (flagStorage.set(flagType, value)) {
             regionData.add("flagStorage", YAPIONSerializer.serialize(flagStorage));
         }
+        setLinkedRegion(region -> region.set(flagType, value));
     }
 
     public <T extends Enum<T> & Flag.Value<T>> Flag.Value<T> get(Flag flagType) {
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/region/loader/RegionLoader.java b/BauSystem_Main/src/de/steamwar/bausystem/region/loader/RegionLoader.java
index 5bd0ce7a..e1953ac4 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/region/loader/RegionLoader.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/region/loader/RegionLoader.java
@@ -84,7 +84,7 @@ public class RegionLoader {
                 optionsYapionObject.add(key, regionData);
             }
 
-            Prototype.generateRegion(regionConfig, regionData);
+            Prototype.generateRegion(key, regionConfig, regionData);
         });
 
         YAPIONObject globalOptions = optionsYapionObject.getObject("global");