Diefendorf Annex houses the Office for University Preparatory Programs (OUPP), and the Department of Exercise & Nutrition Sciences' teaching labs. Like most of the "temporary" buildings on South Campus, it is slated for demolition after the reallocation of its occupants within the next few years.
Charles Haas Diefendorf (1891-1975) was a banker who was very
active in civic, cultural, and philanthropic affairs in Buffalo. He
was a member of the University Council for about 20 years.He was
awarded the Chancellor's Medal in 1961.