If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content
By Dr. Christa Clarke, for The Metropolitan Museum of Art, New York .
Sort by:
AP® is a registered trademark of the College Board, which has not reviewed this resource.