diff --git a/mapbuilding/building.arc b/mapbuilding/building.arc
index b0ede0724..63c459d9b 100644
--- a/mapbuilding/building.arc
+++ b/mapbuilding/building.arc
@@ -222,3 +222,13 @@ subtype 3
 slaying igate_open_2
 face mbiron_gate_inv2.111
 end
+Object building_window
+name Window material
+nrof 1
+weight 200
+value 2000
+type 161
+subtype 4
+face mbwindow.111
+slaying dwall_win1
+end
diff --git a/mapbuilding/building.trs b/mapbuilding/building.trs
index 87e5b0689..3fd4723cb 100644
--- a/mapbuilding/building.trs
+++ b/mapbuilding/building.trs
@@ -32,6 +32,9 @@ treasureone building_material
   list building_objects
    chance 5
   more
+  arch building_window
+   chance 2
+  more
   arch building_vertical_gate_inv
     chance 1
   more
diff --git a/mapbuilding/mbwindow.base.111.png b/mapbuilding/mbwindow.base.111.png
new file mode 100644
index 000000000..a7e12208f
Binary files /dev/null and b/mapbuilding/mbwindow.base.111.png differ