diff --git a/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/base/GUI.java b/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/base/GUI.java
index 62f22e8e..4e5cdf79 100644
--- a/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/base/GUI.java
+++ b/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/base/GUI.java
@@ -1,6 +1,7 @@
 package com.bartlomiejpluta.base.api.game.gui.base;
 
 import com.bartlomiejpluta.base.api.game.gui.component.Component;
+import com.bartlomiejpluta.base.api.game.gui.window.Window;
 import com.bartlomiejpluta.base.api.game.input.KeyEventHandler;
 import com.bartlomiejpluta.base.api.internal.gc.Disposable;
 import com.bartlomiejpluta.base.api.internal.render.Renderable;
@@ -23,6 +24,8 @@ public interface GUI extends Renderable, Disposable, KeyEventHandler {
 
    Component inflateComponent(String widgetUid);
 
+   Window inflateWindow(String widgetUid);
+
    Widget getRoot();
 
    void setRoot(Widget root);
diff --git a/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/BaseWindow.java b/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/BaseWindow.java
index 65162ada..e39ecdaf 100644
--- a/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/BaseWindow.java
+++ b/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/BaseWindow.java
@@ -1,5 +1,6 @@
 package com.bartlomiejpluta.base.api.game.gui.window;
 
+import com.bartlomiejpluta.base.api.game.context.Context;
 import com.bartlomiejpluta.base.api.game.gui.base.BaseWidget;
 import com.bartlomiejpluta.base.api.game.gui.base.GUI;
 import com.bartlomiejpluta.base.api.game.gui.component.Component;
@@ -9,9 +10,29 @@ import com.bartlomiejpluta.base.api.game.screen.Screen;
 import static java.util.Objects.requireNonNull;
 
 public abstract class BaseWindow extends BaseWidget implements Window {
+   protected Context context;
+   protected GUI gui;
    protected Component content;
    protected WindowPosition windowPosition;
 
+   protected BaseWindow(Context context, GUI gui) {
+      this.context = context;
+      this.gui = gui;
+   }
+
+   @Override
+   public void setContent(Component component) {
+      if (this.content != null) {
+         this.content.setParent(null);
+      }
+
+      this.content = component;
+
+      if (component != null) {
+         component.setParent(this);
+      }
+   }
+
    @Override
    public WindowPosition getWindowPosition() {
       return windowPosition;
@@ -38,16 +59,6 @@ public abstract class BaseWindow extends BaseWidget implements Window {
       content.draw(screen, gui);
    }
 
-   @Override
-   public void onOpen(WindowManager manager) {
-      // do nothing
-   }
-
-   @Override
-   public void onClose(WindowManager manager) {
-      // do nothing
-   }
-
    @Override
    public void handleKeyEvent(KeyEvent event) {
       content.handleKeyEvent(event);
diff --git a/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/Window.java b/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/Window.java
index ec12d6be..99811cd2 100644
--- a/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/Window.java
+++ b/api/src/main/java/com/bartlomiejpluta/base/api/game/gui/window/Window.java
@@ -1,13 +1,20 @@
 package com.bartlomiejpluta.base.api.game.gui.window;
 
 import com.bartlomiejpluta.base.api.game.gui.base.Widget;
+import com.bartlomiejpluta.base.api.game.gui.component.Component;
 
 public interface Window extends Widget {
+   void setContent(Component component);
+
    WindowPosition getWindowPosition();
 
    void setWindowPosition(WindowPosition windowPosition);
 
-   void onOpen(WindowManager manager);
+   default void onOpen(WindowManager manager) {
+      // do nothing
+   }
 
-   void onClose(WindowManager manager);
+   default void onClose(WindowManager manager) {
+      // do nothing
+   }
 }
diff --git a/engine/src/main/java/com/bartlomiejpluta/base/engine/context/manager/DefaultContextManager.java b/engine/src/main/java/com/bartlomiejpluta/base/engine/context/manager/DefaultContextManager.java
index a6c43287..21840553 100644
--- a/engine/src/main/java/com/bartlomiejpluta/base/engine/context/manager/DefaultContextManager.java
+++ b/engine/src/main/java/com/bartlomiejpluta/base/engine/context/manager/DefaultContextManager.java
@@ -6,7 +6,7 @@ import com.bartlomiejpluta.base.engine.context.model.DefaultContext;
 import com.bartlomiejpluta.base.engine.core.engine.GameEngine;
 import com.bartlomiejpluta.base.engine.gui.manager.FontManager;
 import com.bartlomiejpluta.base.engine.gui.manager.WidgetDefinitionManager;
-import com.bartlomiejpluta.base.engine.gui.xml.inflater.ComponentInflater;
+import com.bartlomiejpluta.base.engine.gui.xml.inflater.Inflater;
 import com.bartlomiejpluta.base.engine.project.config.ProjectConfiguration;
 import com.bartlomiejpluta.base.engine.project.serial.ProjectDeserializer;
 import com.bartlomiejpluta.base.engine.util.reflection.ClassLoader;
@@ -35,7 +35,7 @@ public class DefaultContextManager implements ContextManager {
    private final FontManager fontManager;
    private final EntityManager entityManager;
    private final ClassLoader classLoader;
-   private final ComponentInflater inflater;
+   private final Inflater inflater;
    private final WidgetDefinitionManager widgetDefinitionManager;
 
    @SneakyThrows
diff --git a/engine/src/main/java/com/bartlomiejpluta/base/engine/context/model/DefaultContext.java b/engine/src/main/java/com/bartlomiejpluta/base/engine/context/model/DefaultContext.java
index 5bddf781..3b5bdf15 100644
--- a/engine/src/main/java/com/bartlomiejpluta/base/engine/context/model/DefaultContext.java
+++ b/engine/src/main/java/com/bartlomiejpluta/base/engine/context/model/DefaultContext.java
@@ -14,7 +14,7 @@ import com.bartlomiejpluta.base.engine.core.engine.GameEngine;
 import com.bartlomiejpluta.base.engine.gui.manager.FontManager;
 import com.bartlomiejpluta.base.engine.gui.manager.WidgetDefinitionManager;
 import com.bartlomiejpluta.base.engine.gui.render.NanoVGGUI;
-import com.bartlomiejpluta.base.engine.gui.xml.inflater.ComponentInflater;
+import com.bartlomiejpluta.base.engine.gui.xml.inflater.Inflater;
 import com.bartlomiejpluta.base.engine.world.entity.manager.EntityManager;
 import com.bartlomiejpluta.base.engine.world.image.manager.ImageManager;
 import com.bartlomiejpluta.base.engine.world.map.manager.MapManager;
@@ -48,7 +48,7 @@ public class DefaultContext implements Context {
    private final FontManager fontManager;
 
    @NonNull
-   private final ComponentInflater inflater;
+   private final Inflater inflater;
 
    @NonNull
    private final WidgetDefinitionManager widgetDefinitionManager;
diff --git a/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/render/NanoVGGUI.java b/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/render/NanoVGGUI.java
index f3cb85d1..c3c00c2e 100644
--- a/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/render/NanoVGGUI.java
+++ b/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/render/NanoVGGUI.java
@@ -4,6 +4,7 @@ import com.bartlomiejpluta.base.api.game.camera.Camera;
 import com.bartlomiejpluta.base.api.game.context.Context;
 import com.bartlomiejpluta.base.api.game.gui.base.*;
 import com.bartlomiejpluta.base.api.game.gui.component.Component;
+import com.bartlomiejpluta.base.api.game.gui.window.Window;
 import com.bartlomiejpluta.base.api.game.input.KeyEvent;
 import com.bartlomiejpluta.base.api.game.screen.Screen;
 import com.bartlomiejpluta.base.api.internal.render.ShaderManager;
@@ -11,7 +12,7 @@ import com.bartlomiejpluta.base.engine.error.AppException;
 import com.bartlomiejpluta.base.engine.gui.manager.FontManager;
 import com.bartlomiejpluta.base.engine.gui.manager.WidgetDefinitionManager;
 import com.bartlomiejpluta.base.engine.gui.widget.ScreenWidget;
-import com.bartlomiejpluta.base.engine.gui.xml.inflater.ComponentInflater;
+import com.bartlomiejpluta.base.engine.gui.xml.inflater.Inflater;
 import com.bartlomiejpluta.base.engine.world.image.manager.ImageManager;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
@@ -35,7 +36,7 @@ public class NanoVGGUI implements GUI {
    private final Context context;
    private final FontManager fontManager;
    private final ImageManager imageManager;
-   private final ComponentInflater inflater;
+   private final Inflater inflater;
    private final WidgetDefinitionManager widgetDefinitionManager;
 
    private long nvg;
@@ -69,7 +70,14 @@ public class NanoVGGUI implements GUI {
    public Component inflateComponent(String widgetUid) {
       log.info("Inflating component by widget definition with UID: [{}]", widgetUid);
       var is = widgetDefinitionManager.loadObject(widgetUid);
-      return inflater.inflate(is, context, this);
+      return inflater.inflateComponent(is, context, this);
+   }
+
+   @Override
+   public Window inflateWindow(String widgetUid) {
+      log.info("Inflating window by widget definition with UID: [{}]", widgetUid);
+      var is = widgetDefinitionManager.loadObject(widgetUid);
+      return inflater.inflateWindow(is, context, this);
    }
 
    @Override
diff --git a/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/ComponentInflater.java b/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/Inflater.java
similarity index 54%
rename from engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/ComponentInflater.java
rename to engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/Inflater.java
index ec350cea..6c403ddd 100644
--- a/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/ComponentInflater.java
+++ b/engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/Inflater.java
@@ -4,6 +4,9 @@ import com.bartlomiejpluta.base.api.game.context.Context;
 import com.bartlomiejpluta.base.api.game.gui.base.GUI;
 import com.bartlomiejpluta.base.api.game.gui.base.SizeMode;
 import com.bartlomiejpluta.base.api.game.gui.component.Component;
+import com.bartlomiejpluta.base.api.game.gui.window.Window;
+import com.bartlomiejpluta.base.api.game.gui.window.WindowPosition;
+import com.bartlomiejpluta.base.engine.error.AppException;
 import com.bartlomiejpluta.base.engine.util.reflection.ClassLoader;
 import lombok.SneakyThrows;
 import org.codehaus.janino.ExpressionEvaluator;
@@ -18,14 +21,17 @@ import java.io.InputStream;
 import java.util.stream.Stream;
 
 @org.springframework.stereotype.Component
-public class ComponentInflater {
-   private static final String[] IMPORTS = Stream.of(GUI.class, SizeMode.class).map(Class::getCanonicalName).toArray(String[]::new);
+public class Inflater {
+   private static final String[] IMPORTS = Stream.of(GUI.class, SizeMode.class, WindowPosition.class)
+         .map(Class::getCanonicalName)
+         .toArray(String[]::new);
+
    private final DocumentBuilder builder;
    private final ClassLoader loader;
 
    @Autowired
    @SneakyThrows
-   public ComponentInflater(ClassLoader loader) {
+   public Inflater(ClassLoader loader) {
       this.loader = loader;
 
       var factory = DocumentBuilderFactory.newInstance();
@@ -34,21 +40,98 @@ public class ComponentInflater {
    }
 
    @SneakyThrows
-   public Component inflate(String xml, Context context, GUI gui) {
+   public Component inflateComponent(String xml, Context context, GUI gui) {
       var document = builder.parse(xml);
-      return parseNode(document.getDocumentElement(), context, gui);
+      return inflateComponent(document.getDocumentElement(), context, gui);
    }
 
    @SneakyThrows
-   public Component inflate(File file, Context context, GUI gui) {
+   public Component inflateComponent(File file, Context context, GUI gui) {
       var document = builder.parse(file);
-      return parseNode(document.getDocumentElement(), context, gui);
+      return inflateComponent(document.getDocumentElement(), context, gui);
    }
 
    @SneakyThrows
-   public Component inflate(InputStream is, Context context, GUI gui) {
+   public Component inflateComponent(InputStream is, Context context, GUI gui) {
       var document = builder.parse(is);
-      return parseNode(document.getDocumentElement(), context, gui);
+      return inflateComponent(document.getDocumentElement(), context, gui);
+   }
+
+   @SneakyThrows
+   public Window inflateWindow(String xml, Context context, GUI gui) {
+      var document = builder.parse(xml);
+      return inflateWindow(document.getDocumentElement(), context, gui);
+   }
+
+   @SneakyThrows
+   public Window inflateWindow(File file, Context context, GUI gui) {
+      var document = builder.parse(file);
+      return inflateWindow(document.getDocumentElement(), context, gui);
+   }
+
+   @SneakyThrows
+   public Window inflateWindow(InputStream is, Context context, GUI gui) {
+      var document = builder.parse(is);
+      return inflateWindow(document.getDocumentElement(), context, gui);
+   }
+
+   @SneakyThrows
+   private Window inflateWindow(Node root, Context context, GUI gui) {
+      var uri = root.getNamespaceURI();
+      var name = root.getLocalName();
+
+      if (uri != null) {
+         name = uri + "." + name;
+      }
+
+      var canonicalName = name.replaceAll("\\*", "").replaceAll("\\.+", ".");
+
+      var windowClass = loader.loadClass(canonicalName);
+
+      var window = (Window) windowClass.getConstructor(Context.class, GUI.class).newInstance(context, gui);
+      var attributes = root.getAttributes();
+
+      // Set attributes via setter methods
+      for (int i = 0; i < attributes.getLength(); ++i) {
+         var attribute = attributes.item(i);
+
+         // Ignore namespaces definitions
+         if ("xmlns".equals(attribute.getPrefix())) {
+            continue;
+         }
+
+         var setterName = createSetterMethodName(attribute.getLocalName());
+         var value = parseValue(attribute.getNodeValue());
+         var setter = windowClass.getMethod(setterName, value.getClass());
+         setter.invoke(window, value);
+      }
+
+      // Parse window content
+      var children = root.getChildNodes();
+
+      boolean hasContent = false;
+
+      for (int i = 0; i < children.getLength(); ++i) {
+         var child = children.item(i);
+
+         if (child.getNodeType() != Node.ELEMENT_NODE) {
+            continue;
+         }
+
+         if (hasContent) {
+            throw new AppException("Window can have at most 1 child");
+         }
+
+         var content = parseNode(child, context, gui);
+         window.setContent(content);
+         hasContent = true;
+      }
+
+      return window;
+   }
+
+   private Component inflateComponent(Node root, Context context, GUI gui) {
+      return parseNode(root, context, gui);
    }
 
    @SneakyThrows