Angell Hall replaced many of the facilities formerly housed in the stylistically muddled University Hall (E.S. Jenison, architect, 1871-3, razed 1950), the main auditorium/classroom/office building on campus for nearly fifty years. [2] (See Illustration 3), and the old Mason Hall (H. Lum, architect 1841) which occupied land just to the east. The basic configuration of University Hall, with a porticoed central pavilion, flanked by long, narrow, multistory wings, appears to have influenced Kahn’s later design in a general way. Only in 1952 did a variation on Kahn’s U-plan get completed, with the construction of new Mason and Haven Halls, creating the current grouping of interconnected buildings.