United States Treasury Building - Robert Mills Design and 19th-Century Construction

The United States Treasury Building on Pennsylvania Avenue includes sections whose construction began in the 1830s and extended through the 19th century, with significant design work by architect Robert Mills. The building served as the headquarters of the U.S. Department of the Treasury and contains notable classical architectural details and sculptural programing related to commerce and finance. It remains one of the oldest executive department buildings in Washington and is documented for its 19th-century federal architecture.