Saint Simon by Simone Martini https://www.nga.gov/artworks/41634-saint-simon
Simon “the Zealot” is one of Jesus’s apostles in the first three Gospels (Matthew, Mark, and Luke), but otherwise Simon is an elusive figure. Legend says that he was martyred by being sawn apart, but there is no saw to indicate his martyrdom in this half-length portrait.
Pitture italiane del rinascimento: catalogo dei principali artisti e delle loro opere