diff --git a/.gitmodules b/.gitmodules
index fdea4a0..0c46c14 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "widgets/WidgetImageBrowser"]
 	path = widgets/WidgetImageBrowser
 	url = https://github.molgen.mpg.de/MPIBR-WidgetToolbox/WidgetImageBrowser.git
+[submodule "widgets/WidgetNeuroTree"]
+	path = widgets/WidgetNeuroTree
+	url = https://github.molgen.mpg.de/MPIBR-WidgetToolbox/WidgetNeuroTree.git
diff --git a/NeuroBits.m b/NeuroBits.m
index c368107..5702071 100644
--- a/NeuroBits.m
+++ b/NeuroBits.m
@@ -1,13 +1,18 @@
 classdef NeuroBits < handle
     
+    properties (Access = public)
+        
+        widget_FolderBrowser
+        widget_ImageBrowser
+        widget_NeuroTree
+        
+    end
+    
     properties (Access = private)
         
         ui_parent
         ui_layout
         
-        widget_FolderBrowser
-        widget_ImageBrowser
-        
     end
     
     properties (Access = private, Constant = true)
@@ -63,6 +68,13 @@
                 error('NeruoBits :: failed to initialize WidgetImageBrowser');
             end
             
+            %% initialize NeuroTree
+            obj.widget_NeuroTree = WidgetNeuroTree('Parent', obj.ui_layout,...
+                                                   'Viewer', obj.widget_ImageBrowser.viewer.parent);
+            if ~isa(obj.widget_NeuroTree, 'WidgetNeuroTree')
+                error('NeruoBits :: failed to initialize WidgetNeuroTree');
+            end
+            %}
             
         end
         
diff --git a/test.m b/NeuroBitsTest.m
similarity index 100%
rename from test.m
rename to NeuroBitsTest.m
diff --git a/widgets/WidgetNeuroTree b/widgets/WidgetNeuroTree
new file mode 160000
index 0000000..febeae1
--- /dev/null
+++ b/widgets/WidgetNeuroTree
@@ -0,0 +1 @@
+Subproject commit febeae1dd453c3b6bd4c32005ffda24985ecaa63