Although the store on Market Street was often called the "cast-iron building", only two of original building's facades (at 719-721 Market and 714-718 Arch Street) are actually cast iron. The other buildings are brick, faced with marble or granite. The two end buildings are brick and terra-cotta, with galvanized iron trim and octagonal towers. The uniformity of the entire Renaissance Revival-style facade is supported by the use of a classical arch window in all of the buildings, which are painted the same color.