Robert G. Ousterhout is Professor of the History of Art at the University of Pennsylvania, where he directs the Center for Ancient Studies. A specialist in Byzantine art and architecture, his research focuses on the vanishing architectural heritage of the Eastern Mediterranean. He is the author of numerous books, including Master Builders of Byzantium, 2nd edition (2008), The Byzantine Monuments of the Evros/Meric River Valley (2007, with Ch. Bakirtzis), and A Byzantine Settlement in Cappadocia, 2nd edition (2011).