William Clark is a professor of Art History and an internationally recognized scholar of medieval art and architecture who has published in the major journals in the field, authored four books (so far) and numerous scholarly papers published here and abroad. Clark presents three to four papers at conferences and meetings every year. He has appeared in the PBS series "The Art of the Western World," which is regularly rebroadcast, and on a Nova program with Robert Mark. His major interests focus on the conceptual thinking of medieval builders, artists and patrons, as is revealed in the works of art, revival elements in medieval architecture, and the beginnings of architectural photography in Europe.