Oeil-de-boeuf windows

Oeil-de-boeuf window (courtesy of Chien Chih-hung)

An oeil-de-boeuf window is named so because it is round in shape and looks like the eye of a bull. Such windows are found high in the walls of the central part and corners of the building. Keystones are arranged like wheel spokes radiating out from the windows to further accentuate them.