More free lessons at: http://www.khanacademy.org/video?v=7PsgPJoGWig
Simone Martini, Annunciation, 1333, tempera on panel, 72 1/2 x 82 5/8" or 184 x 210 cm. (Uffizi, Florence)

Speakers: Dr. Steven Zucker and Dr. Beth Harris

View this work up close on the Google Art Project: http://www.googleartproject.com/collection/uffizi-gallery/artwork/annunc...