Adoration of the Magi, a stained glass window originally the gift of Pope Leo X to Cortona Cathedral, by Gugliemo de Marcellai, 1516 located at a Private Collection. The Adoration of the Magi, a stained glass window originally the gift of Pope Leo X to Cortona Cathedral, by Gugliemo de Marcellai, 1516 was created around 1516 AD. Valentine's Day, Leo, Pope Leo X, Pope Leo, Adoration, Pope, Cathedral, Valentines, Collection