Architectural historian and first director, CASVA, 1979-2000. Millon was raised in Altoona, PA where his father was an aerial photographer and his mother, whose father published of a French-language newspaper in New York, was a housewife. After high school with World War II still active, he entered a US Navy ROTC program at Tulane University in 1944 assigned to active duty until1946. He married Judith Rice (Millon). After the war, he returned Tulane gaining degrees in English, Physics, and Architecture. He entered Harvard University receiving a Master's in Architecture and Urban Design, and a second Master's degree (and eventually Ph.D.) in History of Art. A Fulbright Fellowship and a subsequent fellowship at the American Academy in Rome allowed him to study in Italy for three years. He returned to begining teaching at Massachusetts Institute of Technology as a Visiting Professor in 1960. He published his survey Baroque and Rococo Architecture in 1961 followed by Key Monuments of the History of Architecture in 1964, Millon served as the president of the Society of Architectural Historians for 1968-1969.Between 1974 and 1977 he was director of the American Academy in Rome. Millon was named the first dean of CASVA, the Center for Advanced Study in the Visual Arts, National Gallery of Art, Washington DC in 1979. He retired from the Center 21 years later.
Filippo Juvarra. Drawings from the Roman Period, Part I (1984), Part II, with A. Griseri, S. McPhee, and M. Viale Ferrero (1999), three exhibition catalogues, Michelangelo Architect, with C.H. Smyth (1988), The Renaissance from Brunelleschi to Michelangelo, with V. Lampugnani (1994), The Triumph of the Baroque (1999), and numerous articles.
Millon has held grants from the American Council of Learned Societies, the National Endowment for the Humanities, the Institute for Advanced Study, the Getty Research Institute, and a Senior Fulbright. He has received awards from the American Institute of Architects; Academie des sciences morale et politique, Institut de France; and the College Art Association.
Millon served as President, Society of Architectural Historians; Convenor, Architectural Drawings Advisory Group; President, Foundation for Documents of Architecture; Scientific Secretary, Thesarus Artis Universalis Working Group of the International Committee for the History of Art; Vice-Chair, Council on American Overseas Research Centers; Chair, Dumbarton Oaks Senior Fellows Committee, Program in History of Landscape Architecture; President, International Union of Academies of Archaeology, History and History of Art in Rome; President, University Film Study Center; Vice-Chair, Boston Landmarks Commission, and Co-Chair, Advisory Committee, Cambridge Architectural Historical Survey. He currently serves as Curator, American Philosophical Society.