A 16th-century drawing of a nude man, seen from behind, has been identified as a study by Michelangelo for his monumental masterpiece, the ceiling fresco of the Sistine Chapel in the Vatican. https://www.theguardian.com/artanddesign/2023/feb/19/when-we-rotated-it-90-degrees-it-was-obvious-mystery-sketch-is-rare-michelangelo-draft-for-sistine-chapel