Rotch & Tilden was an American architectural firm active in Boston, Massachusetts from 1880 through 1895. The firm was organized by partners Arthur Rotch and George Thomas Tilden. Both had studied at the Massachusetts Institute of Technology and at École des Beaux-Arts in Paris. Both had worked at the architectural firm of "Ware and Brunt". They were called "society architects” because of their families and their clientele. The firm was perhaps best known for lavish summer houses in Bar Harbour, Maine and for townhouses lining Commonwealth Avenue in the Back Bay area of Boston.