Party affiliation: Republican
Instructor Yale, 1936-1940, assistant professor of history of art, 1940-1943, 1945-1947, associate professor, 1947-1952, professor, 1952-1978, professor emeritus, 1978-1982, department chairman history art, 1947-1953, 62-65. Excavated in Abbey Church St. Denis, north of Paris, summers 1938, 39, 46, 47, 48, 67, 68, 69, 71. Curator Art Gallery, 1946-1978.
Fellow Berkeley College, Yale, 1939-1982. Chairman Carolyn Foundation. Director The Crosby Company Visiting committee fine arts Harvard, 1959-1965.
Member visiting committee department art and archaeology Princeton, 1962-1968. Director International Center Medieval Art, 1956-1982, president, 1965-1968. Member international committee history art, 1950-1975.
Author: Abbey of St. Denis I, 1942, L’Abbaye Royale de Saint-Denis, 1952, The Apostle Bas-Relief at Saint-Denis, 1972. Member of the board, Speculum, 1946-1954. Editor: Art Through the Ages, 1959, Religious Art in France Thirteenth Century, Corpus Vitrearum Medii Aevi.
Member editorial board: Art Bulletin Trustee American Federation Arts, 1940-1945, 49-50. Member College Art Association, director, 1939-1945 and 1947-1952, president, 1940-1944. Executive secretary American Council of Learned Socs.
Committee on Preservation of Cultural Materials in War Areas, 1943-1944. Special adviser American Common for the Protection and Salvage of Artistic and Historic Monuments in War Areas, 1944-1946. Special advisory on Restitution of Cultural Materials Department State, 1945.
Member Medieval Academy American, Archaeol. Institute American (trustee 1966-1969), Societe d’Archeologie Francaise, Society National des Antiquaires de France (honorary), American Philosophical Society, American Academy Arts and Sciences, Alpha Delta Phi. Clubs: Century Association (New York City), Yale (New York City).