Count Enzensberg, Enzensberg Castle, Germany; Richard von Kaufmann, Berlin; Camilio Castiglioni, Vienna; Jules S. Bache, New York; Irwin Untermyer, New York (until 1964)
Gómez-Moreno, Carmen. Medieval Art from Private Collections: A Special Exhibition at The Cloisters, October 30, 1968 through January 5, 1969. New York: The Metropolitan Museum of Art, 1968. no. 127.
Songs of Glory: Medieval Art from 900 to 1500. Oklahoma City: Oklahoma Museum of Art, 1985. no. 68, pp. 25; 204-206.