Michelangelo's first known painting, created when he was 12 or 13 years old, is a depiction of the torment of Saint Anthony, based on a widely known engraving by Martin Schongauer. The painting was not thought to be by Michelangelo until it was examined and cleaned by the Metropolitan Museum of Art in 2008. Infrared reflectography revealed pentimenti, or correction marks, which suggest that the painting is an original work created with artistic freedom. The painting is now attributed to Michelangelo and is considered one of his earliest known works.