Mary O'Neill is an art historian and art appraiser based in Washington, D.C. She lectures on various aspects of art history in locations around the world, such as Art Basel in Miami, the Chautauqua Institute in New York, and dozens of international cities for Smithsonian Journeys. Mary has published articles in several national publications, including a cover story for Smithsonian magazine, “Virtue and Beauty: The Renaissance Image of the Ideal Woman.”