Boston Society of Architects

One of the oldest and largest chapters of the AIA, the Boston Society of Architects (BSA) is a nonprofit membership organization committed to architecture, design and the built environment. History On June 20, 1867, approximately 50 architects convened in the City of Boston to sign the articles of association for the Boston Society of Architects. Since this time, the BSA has grown to approximately 4,000 members, making it one of the largest branches of the AIA. The BSA became the eastern Massachusetts regional association of the AIA in 1870. It has sister chapters in Central Massachusetts and Western Massachusetts. These three chapters constitute AIA Massachusetts.