I decided to go with painted buildings that use the trompe-l'oeil technique, creating optical illusions, which make windows, shutters, bricks, etc. appear to be three-dimensional. The first two photos were taken in Santa Margherita Ligure and the last three were taken in Acqui Terme.
All but the shutters are painted in this photo.
Close up of the trompe-l'oeil technique above the door
Whoops! This one really fooled me. I thought the shutters were real at first.