Zantzinger, Borie and Medary was an American architecture firm that operated from 1905 to 1950 in Philadelphia. It specialized in institutional and civic projects. For most of its existence, the partners were Clarence C. Zantzinger, and Milton Bennett Medary, all Philadelphians. The firm was a launching pad for numerous architects of note, including Dominique Berninger (1898–1949) and Louis Kahn (1901–1974).