diff --git a/gui/gui.glade b/gui/gui.glade
index 274d0a49..00f0213d 100644
--- a/gui/gui.glade
+++ b/gui/gui.glade
@@ -485,11 +485,11 @@ The bar represents the percentage of available time used for audio processing (i
             <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
             <property name="position">204</property>
             <child>
-              <widget class="GtkViewport" id="project_list_viewport">
+              <widget class="GtkViewport" id="world_tree_viewport">
                 <property name="visible">True</property>
                 <property name="resize_mode">GTK_RESIZE_QUEUE</property>
                 <child>
-                  <widget class="GtkTreeView" id="projects_list">
+                  <widget class="GtkTreeView" id="world_tree">
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
diff --git a/gui/main.c b/gui/main.c
index 7555ad66..107c2443 100644
--- a/gui/main.c
+++ b/gui/main.c
@@ -33,6 +33,7 @@
 #include "dbus_helpers.h"
 #include "control_proxy.h"
 #include "../dbus_constants.h"
+#include "world_tree.h"
 
 #if 0
 class Patchage {
@@ -965,15 +966,21 @@ void control_proxy_on_studio_appeared(void)
 {
   g_studio_view = create_view("Studio", SERVICE_NAME, STUDIO_OBJECT_PATH);
   attach_view(g_studio_view);
+  world_tree_add_studio(g_studio_view->graph);
+
   g_jack_view = create_view("Raw JACK", JACKDBUS_SERVICE_NAME, JACKDBUS_OBJECT_PATH);
   attach_view(g_jack_view);
+  world_tree_add_jack(g_jack_view->graph);
 }
 
 void control_proxy_on_studio_disappeared(void)
 {
   detach_view(g_jack_view);
+  world_tree_remove(g_jack_view->graph);
   destroy_view(g_jack_view);
+
   detach_view(g_studio_view);
+  world_tree_remove(g_studio_view->graph);
   destroy_view(g_studio_view);
 }
 
@@ -998,6 +1005,8 @@ int main(int argc, char** argv)
   main_win = get_glade_widget("main_win");
   g_main_scrolledwin = GTK_SCROLLED_WINDOW(get_glade_widget("main_scrolledwin"));
 
+  world_tree_init();
+
   patchage_dbus_init();
 
   if (!control_proxy_init())
diff --git a/gui/world_tree.c b/gui/world_tree.c
index 4497ec74..7113a77c 100644
--- a/gui/world_tree.c
+++ b/gui/world_tree.c
@@ -26,6 +26,7 @@
 
 #include "common.h"
 #include "world_tree.h"
+#include "glade.h"
 
 #if 0
 #include <iostream>
@@ -378,22 +379,69 @@ project_list::set_lash_availability(
 }
 #endif
 
+enum
+{
+  COL_NAME = 0,
+  COL_GRAPH,
+  NUM_COLS
+};
+
+GtkWidget * g_world_tree_widget;
+GtkTreeStore * g_treestore;
+
 void world_tree_init(void)
 {
+  GtkTreeViewColumn * col;
+  GtkCellRenderer * renderer;
+
+  g_world_tree_widget = get_glade_widget("world_tree");
+  gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(g_world_tree_widget), FALSE);
+
+  col = gtk_tree_view_column_new();
+  gtk_tree_view_column_set_title(col, "Name");
+  gtk_tree_view_append_column(GTK_TREE_VIEW(g_world_tree_widget), col);
+  renderer = gtk_cell_renderer_text_new();
+  gtk_tree_view_column_pack_start(col, renderer, TRUE);
+  gtk_tree_view_column_add_attribute(col, renderer, "text", COL_NAME);
+
+  g_treestore = gtk_tree_store_new(NUM_COLS, G_TYPE_STRING, G_TYPE_POINTER);
+  gtk_tree_view_set_model(GTK_TREE_VIEW(g_world_tree_widget), GTK_TREE_MODEL(g_treestore));
 }
 
 void world_tree_add_studio(graph_handle graph)
 {
-}
+  GtkTreeIter iter;
 
-void world_tree_remove_studio(graph_handle graph)
-{
+  gtk_tree_store_append(g_treestore, &iter, NULL);
+  gtk_tree_store_set(g_treestore, &iter, COL_NAME, "Studio", COL_GRAPH, graph, -1);
 }
 
 void world_tree_add_jack(graph_handle graph)
 {
+  GtkTreeIter toplevel;
+
+  gtk_tree_store_append(g_treestore, &toplevel, NULL);
+  gtk_tree_store_set(g_treestore, &toplevel, COL_NAME, "JACK", COL_GRAPH, graph, -1);
 }
 
-void world_tree_remove_jack(graph_handle graph)
+void world_tree_remove(graph_handle graph)
 {
+  GtkTreeIter iter;
+  gchar * name;
+  graph_handle graph2;
+
+  if (gtk_tree_model_get_iter_first(GTK_TREE_MODEL(g_treestore), &iter))
+  {
+    do
+    {
+      gtk_tree_model_get(GTK_TREE_MODEL(g_treestore), &iter, COL_NAME, &name, COL_GRAPH, &graph2, -1);
+      //lash_info("'%s' %p", name, graph2);
+      if (graph == graph2)
+      {
+        gtk_tree_store_remove(g_treestore, &iter);
+        return;
+      }
+    }
+    while (gtk_tree_model_iter_next(GTK_TREE_MODEL(g_treestore), &iter));
+  }
 }
diff --git a/gui/world_tree.h b/gui/world_tree.h
index 34f284cf..fc93dcc6 100644
--- a/gui/world_tree.h
+++ b/gui/world_tree.h
@@ -32,9 +32,7 @@
 void world_tree_init(void);
 
 void world_tree_add_studio(graph_handle graph);
-void world_tree_remove_studio(graph_handle graph);
-
 void world_tree_add_jack(graph_handle graph);
-void world_tree_remove_jack(graph_handle graph);
+void world_tree_remove(graph_handle graph);
 
 #endif // #ifndef WORLD_TREE_H__D786489B_E400_4E92_85C7_2BAE606DE56D__INCLUDED