diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/gui/BauGUI.java b/BauSystem_Main/src/de/steamwar/bausystem/features/gui/BauGUI.java
new file mode 100644
index 00000000..ded935c2
--- /dev/null
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/gui/BauGUI.java
@@ -0,0 +1,60 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2021  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.gui;
+
+import de.steamwar.bausystem.linkage.GuiItem;
+import de.steamwar.inventory.SWInventory;
+import lombok.experimental.UtilityClass;
+import org.bukkit.entity.Player;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@UtilityClass
+public class BauGUI {
+
+    private static final Set<GuiItem> ITEMS = new HashSet<>();
+
+    private static final Set<Player> OPEN_INVS = new HashSet<>();
+    private static boolean updating = false;
+
+    public static void addItem(GuiItem item) {
+        ITEMS.add(item);
+    }
+
+    public static void openBauGui(Player p) {
+        if (!updating) {
+            OPEN_INVS.add(p);
+        }
+        SWInventory inv = new SWInventory(p, 5 * 9, "Bau GUI");
+        ITEMS.forEach(item -> inv.setItem(item.getSlot(), item.getItem(p), item::click));
+        inv.addCloseCallback(clickType -> {
+            if (!updating) {
+                OPEN_INVS.remove(p);
+            }
+        });
+    }
+
+    public static void update() {
+        updating = true;
+        OPEN_INVS.forEach(BauGUI::openBauGui);
+        updating = false;
+    }
+}
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/linkage/GuiItem.java b/BauSystem_Main/src/de/steamwar/bausystem/linkage/GuiItem.java
new file mode 100644
index 00000000..9288f2f9
--- /dev/null
+++ b/BauSystem_Main/src/de/steamwar/bausystem/linkage/GuiItem.java
@@ -0,0 +1,42 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2021  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.linkage;
+
+import de.steamwar.bausystem.features.gui.BauGUI;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.ClickType;
+import org.bukkit.inventory.ItemStack;
+
+@AllArgsConstructor
+public abstract class GuiItem {
+
+    @Getter
+    private final int slot;
+
+    public abstract ItemStack getItem(Player player);
+
+    public abstract boolean click(ClickType click);
+
+    public void update() {
+        BauGUI.update();
+    }
+}
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/linkage/LinkageType.java b/BauSystem_Main/src/de/steamwar/bausystem/linkage/LinkageType.java
index e9a57432..8a73906c 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/linkage/LinkageType.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/linkage/LinkageType.java
@@ -20,6 +20,7 @@
 package de.steamwar.bausystem.linkage;
 
 import de.steamwar.bausystem.BauSystem;
+import de.steamwar.bausystem.features.gui.BauGUI;
 import de.steamwar.command.SWCommand;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -40,7 +41,8 @@ public enum LinkageType {
     DISABLE_LINK(0, true, Disable.class::isAssignableFrom, o -> ((Disable) o).disable()),
     PLAIN(1, false, clazz -> true),
     LISTENER(2, false, Listener.class::isAssignableFrom, o -> Bukkit.getPluginManager().registerEvents((Listener) o, BauSystem.getInstance())),
-    UNLINK_LISTENER(2, true, Listener.class::isAssignableFrom, o -> HandlerList.unregisterAll((Listener) o));
+    UNLINK_LISTENER(2, true, Listener.class::isAssignableFrom, o -> HandlerList.unregisterAll((Listener) o)),
+    GUIITEM(3, false, GuiItem.class::isAssignableFrom, o -> BauGUI.addItem((GuiItem) o));
 
     private final int order;
 
@@ -49,5 +51,6 @@ public enum LinkageType {
     private final Predicate<Class<?>> linkagePredicate;
 
     @SuppressWarnings("FieldMayBeFinal")
-    private Consumer<Object> linkageConsumer = o -> {};
+    private Consumer<Object> linkageConsumer = o -> {
+    };
 }
\ No newline at end of file