Another Old Window ...
with Uni Posca Markers (I used a Marvy Garden Craft Marker too and it works just as well). All done on the back side of the glass, so that I can use the marker on the front and then clean it off (Posca Markers come off easily with rubbing alcohol).
You may remember the Eiffel Tower window I did a while back with the same markers.
Here is a link that might be useful: My Eiffel Tower Window post