The original wing is a red brick structure that is adjacent to Shoemaker Green next to the Palestra. The addition is in a more modern style, and faces Walnut Street. DRL is home to the Department of Mathematics, the Department of Physics and Astronomy, and the Multi-Media and Educational Technology Services center. DRL contains the Mathematics, Physics and Astronomy Library. The building is named after David Rittenhouse (1731-1796), who was professor of astronomy at Penn, the first director of the United States Mint, and president of the American Philosophical Society.