Mark J JohnsonMark J. Johnson Born 1954 in Ogden, Utah, USA Completed PhD in art history at Princeton University in 1986 Taught in the School of Architecture, University of Illinois at Champaign-Urbana, 1986-87; since 1987 has been a member of the art history facuty at Brigham Young University in Provo, Utah, where he is now professor of ancient and medieval art and architecture. Has published numerous articles on Early Christian and Byzantine art and architecture. His book, "The Roman Imperial Mausoleum in Late Antiquity" was published in 2009. Read More Read Less