|Photograph Copyright ©2013 Loo Yen Yeo. All Rights Reserved.|
Description: The top of the vaulted arch (out of shot) forms the apex of an implied triangle by the Principle of Continuity, with its baseline at the cornice. Four triangles are contained therein: two actual ones, above two implied triangles of the chapel arches. The shadows and the altar of the Doni Chapel imply further triangles. Principles of Proximity and Similarity combine to Common Fate - completing the larger triangles of the chapels, and implying two more by the fall of shadows within them.