Joseph Antenucci Becherer is the director and curator of sculpture at the University of Notre Dame art museum. Formerly he was the founding director and curator of the sculpture program at Frederik Meijer Gardens & Sculpture Park and professor of art history at Aquinas College in Grand Rapids, Michigan.

Henry Martin Luttikhuizen is professor of art history emeritus at Calvin University. He has coauthored and coedited several books on medieval and northern Renaissance art. Luttikhuizen also wrote numerous chapters for The History of Art: A Global View.