Modernist architect based in New York City, 1929-1950, and professor of architecture at the University of Michigan, 1950-1972, where he also carried on an active private practice until shortly before his death in 1990. A graduate of MIT, Muschenheim studied further with Peter Behrens at the Vienna Academy of Fine Arts and was strongly influenced both by a visit to the Bauhaus in Weimar, Germany and by a period working in urban planning with Peter Korn in Berlin. Two major Muschenheim collections exist, one within the Avery Architectural and Fine Arts Library at Columbia University and another within the Bentley Historical Library at the University of Michigan. The Muschenheim collection at the Avery represents primarily his professional career from 1929 to 1957, and the Muschenheim collection at the Bentley concerns his later professional practice and teaching career at the University of Michigan, as of 1950. This finding aid describes both the Avery and Bentley collections.