U.S. Custom House is a historic custom house building located at Baltimore, Maryland, United States. It is a granite, steel frame structure measuring 252 feet 8 inches (77.01 m) by 139 feet 6 inches (42.52 m). It is an exceptionally distinguished example of Beaux Arts architecture and was built from 1903 through late 1907 from plans by Hornblower and Marshall, a Washington, D.C. firm. The ceiling of the Call Room, located in the pavilion, was painted by Francis Davis Millet (1846–1912). It served as Baltimore's Custom House until 1953. Since that time various Federal agencies have occupied the building.