diff --git a/.flowconfig b/.flowconfig
index da47905..6b800d7 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -1,4 +1,5 @@
 [ignore]
+.*node_modules/react-event-listener/.*
 
 [include]
 src/
diff --git a/src/appbar.js b/src/appbar.js
index 4ff1165..e7d7cf6 100644
--- a/src/appbar.js
+++ b/src/appbar.js
@@ -4,11 +4,24 @@ import AppBar from "material-ui/AppBar";
 import CircularProgress from "material-ui/CircularProgress";
 import MapIcon from "material-ui/svg-icons/maps/map";
 import PhonelinkOffIcon from "material-ui/svg-icons/hardware/phonelink-off";
+import LayersIcon from "material-ui/svg-icons/maps/layers";
 import IconMenu from "material-ui/IconMenu";
 import IconButton from "material-ui/IconButton";
 import MenuItem from "material-ui/MenuItem";
 import { orange400, grey50 } from "material-ui/styles/colors";
 
+const TopBarLayerSelector = (props: Object) => (
+  <IconMenu
+    iconButtonElement={
+      <IconButton style={{width: 48, height: 48, padding: 0}}
+          iconStyle={{width: 48, height: 48}}>
+        <LayersIcon color={grey50} />
+      </IconButton>}
+    style={{width:48, height:48}}>
+    <MenuItem primaryText="Layer1" />
+  </IconMenu>
+)
+
 const TopBarIndicatorMenu = (props: Object) => (
   <IconMenu
     iconButtonElement={
@@ -37,6 +50,7 @@ const TopBar = (props: Object) => (
   <AppBar title={props.title}
           style={{background:orange400}}
           iconElementLeft={<TopBarIndicator {...props} />}
+          iconElementRight={<TopBarLayerSelector {...props} />}
           className="nav"
   />);
 
diff --git a/src/config.js b/src/config.js
index 7f9c5e7..2083a4b 100644
--- a/src/config.js
+++ b/src/config.js
@@ -212,7 +212,24 @@ const config : Config = {
         }
       ]
     }
-  }
+  },
+  layers: [
+    {
+      image: "img/layers/rzl/rooms.png",
+      forceVisibility: "on",
+      name: "RaumZeitLabor"
+    },
+    {
+      image: "img/layers/rzl/details.png",
+      forceVisibility: "on",
+      name: "Details"
+    },
+    {
+      image: "img/layers/rzl/labels.png",
+      forceVisibility: "on",
+      name: "Labels"
+    }
+  ]
 };
 
 export default config;
diff --git a/src/index.jsx b/src/index.jsx
index 6fb8e87..f16f446 100644
--- a/src/index.jsx
+++ b/src/index.jsx
@@ -45,8 +45,7 @@ return (
         </Drawer>
       </div>
     </MuiThemeProvider>
-    <SpaceMap width={640} height={640} image="rzl.svg" zoom={0.1}
-        store={store} state={state} />
+    <SpaceMap width={950} height={640} image="rzl.png" zoom={0.1} state={state} />
   </div>
 );}
 
diff --git a/src/map.js b/src/map.js
index 0809212..55c703b 100644
--- a/src/map.js
+++ b/src/map.js
@@ -6,6 +6,7 @@ import R from "ramda";
 import Config from "./config";
 import { Actions } from "./state";
 import { keyOf } from "./util";
+import { store } from "./state";
 
 import ActionInfo from 'material-ui/svg-icons/action/info';
 import ReactDOM from "react-dom";
@@ -34,18 +35,26 @@ const Markers = (props) => R.values(R.mapObjIndexed((el,key) => (
         iconSize: Leaflet.point(32,32)
       })}>
     <Popup
-      onOpen={() => props.store.dispatch({type: Actions.CHANGE_UI, payload: key})}
-      onClose={() => props.store.dispatch({type: Actions.CHANGE_UI})}>
+      onOpen={() => store.dispatch({type: Actions.CHANGE_UI, payload: key})}
+      onClose={() => store.dispatch({type: Actions.CHANGE_UI})}>
         <span>{el.name}</span>
     </Popup>
   </Marker>
 ), R.propOr({}, "controls", Config)));
 
-const SpaceMap = (props: Object) => (
+const Layer = (layer: Layer, bounds: Array<Array<number>>) => (
+  <ImageOverlay url={layer.image} bounds={bounds} />
+);
+
+const visibleLayers = (state: State) => R.filter(
+  x => (x.forceVisibility == null && R.contains(state.visibleLayers, x.image))
+      || x.forceVisibility == "on", Config.layers)
+
+const SpaceMap = (props: { state: State, width: number, height: number,
+    zoom: number, image: string}) => (
   <Map center={c([props.width / 2, props.height / 2])} zoom={props.zoom}
       crs={Leaflet.CRS.Simple}>
-    <ImageOverlay url={props.image}
-        bounds={[c([0,0]), c([props.width, props.height])]} />
+    {R.map(x => Layer(x, [c([0,0]), c([props.width, props.height])]), visibleLayers(props.state))}
     {Markers(props)}
   </Map>
 );
diff --git a/src/state.js b/src/state.js
index b2af3dd..22d4218 100644
--- a/src/state.js
+++ b/src/state.js
@@ -17,7 +17,8 @@ const initState : State = {
     topic => { return {
       internal: keyOf(topic.values, topic.defaultValue),
       actual: topic.defaultValue
-    }}, Config.topics)
+    }}, Config.topics),
+  visibleLayers: []
 };
 
 const onMessage = (state: State, action: StateAction) => {
diff --git a/types/types.js b/types/types.js
index cfe6b3a..6c2daea 100644
--- a/types/types.js
+++ b/types/types.js
@@ -41,7 +41,8 @@ declare type Controls = Map<string,Control>;
 
 declare type Config = {
   topics: Topics,
-  controls: Controls
+  controls: Controls,
+  layers: Array<Layer>
 };
 
 declare type State = {
@@ -53,10 +54,17 @@ declare type State = {
   // topic, for example given by:
   // values: { off: "OFF", on: "ON" }
   // and actual is the value of that or whatever is given by mqtt.
-  values: Map<string, { internal: ?string, actual: any }>
+  values: Map<string, { internal: ?string, actual: any }>,
+  visibleLayers: Array<string>
+};
+
+declare type Layer = {
+  image: string,
+  name: string,
+  forceVisibility?: "on"|"off"
 };
 
 declare type StateAction = {
   type: "DISCONNECT" | "CONNECT" | "MESSAGE" | "UI_POPUP",
   payload?: any
-}
+};
diff --git a/webpack.config.js b/webpack.config.js
index 4126c0f..28967d4 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -13,7 +13,7 @@ module.exports = {
     extensions: ['.js', '.jsx']
   },
   entry:  [
-    path.resolve(__dirname, 'src/index.js')
+    path.resolve(__dirname, 'src/index.jsx')
   ],
   output: {
     path: path.resolve(__dirname, 'dist'),