Michelangelo Buonarroti Cleopatra 1535 circa black pencil, The male nude appears above the spandrel depicting The Brazen Serpent in the Sistine Chapel The literature on Michelangelo was well advanced at the time that Burne-Jones was making this sketchbook. He was already an admirer, demonstrated by these studies taken from reproductions, but did not visit the Sistine Chapel until 1871.