This handsome piece of medieval architecture is the Santa Fosca chapel on the island of Torcello, near Venice, Italy. It's octagonal with a central conical dome and four upper-story skylights. I copied this out of a beautifully printed book of photographs of European antiquities that I found in my parents' house. Sometime when I have time I will make an artistic adaptation and turn this into an occult temple worthy of the magical Deryni of Katherine Kurtz.
Ink and marker on sketchbook page, about 4 1/2" x 4 1/2", September 2013.