Byzantine icon from Crete, 15th. century.

Cavallini, The Annunciation, ca. 1291.

Cimabue, Madonna Enthroned, ca. 1280.

Giotto, Madonna enthroned, ca. 1310.

Duccio, Maesta with Twenty Angels and Nineteen Saints, 1308-1311.

Botticelli, Virgin and Child Enthroned Between St. John the Baptist and St. John the Evangelist, ca. 1484.