The Grand Lodge of North Dakota, Ancient Order of United Workmen is a building in Fargo, North Dakota that was built in 1914 in Early Commercial style. It was designed by architects Haxby & Gillespie. Also known as the Fossum Building and as Interstate Business College, it was listed on the National Register of Historic Places in 1979. It served historically as a clubhouse of the Ancient Order of United Workmen and as a business. The building is significant in the history of Fargo and North Dakota, and also significant architecturally.