Manuscript Leaf with the Assumption of the Virgin in an Initial V, from an Antiphonary (1340) by Niccolò di ser Sozzo - Public Domain Catholic Painting

The Assumption of the Virgin, celebrated on August 15, is an especially important holiday in Siena. Niccolò di ser Sozzo, one of the city's renowned fourteenth-century illuminators, painted it on numerous occasions. Tempera, ink, and gold on parchment, 57.5 x 40.4 cm.