The Architects Collaborative (TAC) was an American architectural firm formed by Walter Gropius and seven younger architects in 1945 in Cambridge, Massachusetts. The other partners were Norman C. Fletcher (1917-2007), Jean B. Fletcher (1915-1965), John C. Harkness (b. 1916), Sarah P. Harkness (1914-2013), Robert S. McMillan (1916-2001), Louis A. McMillen (1916-1998) and Benjamin C. Thompson (1918-2002). TAC created many successful projects, and was well respected for its broad range of designs, being considered one of the most notable firms in post-war modernism.