Old Colony Building

The Old Colony Building is 17-story landmark building in the Chicago Loop community area of Chicago, Illinois. Designed by the architectural firm Holabird & Roche in 1893-94, it stood at approximately 215 feet and was the tallest building in Chicago at the time it was built. The building was designated a Chicago Landmark on July 7, 1978.

The building was added to the National Register of Historic Places in 1976. It is directly across the street to the west of the Harold Washington Library. The address of the Old Colony Building is 407 S. Dearborn Street and the GIS coordinates are +41.876657-87.629006.