Piero depicts this unknown man in an Augustinian habit, with his hair trimmed in the tonsure of a friar. He may be Leonard, an important saint in the history of Borgo San Sepolcro and the one to whom the town’s foundational oratory was dedicated. All four paintings on this wall have gold backgrounds, identifying them as panels that decorated the frame of the Sant’Agostino altarpiece. Its gilded surfaces reflected the candlelight, making these figures appear as divine visions within a glittering surround.