The Benjamin Franklin National Memorial is located in The Franklin Institute's rotunda. The centerpiece of the memorial is a dramatic 20-foot high marble statue of Benjamin Franklin. Sculpted by James Earle Fraser, the statue weighs 30 tons and sits on a 92-ton pedestal of white Seravezza marble. Originally opened in 1938, the rotunda was designed by architect John T. Windrim and modeled after the Pantheon in Rome. It measures 82 feet in length, width, and height. The domed ceiling is self-supporting and weighs 1600 tons. The floors, walls, columns, pilasters, and cornices are made of rare marbles from Portugal, Italy, and France.