Old Colony Building

The Old Colony Building, now known as The Arc at Old Colony, is a seventeen-story landmark in Chicago's Loop neighborhood. Designed by Holabird & Roche in 1893 and 1894, the building stands about 215 feet (65.5 meters) tall and is one of the city's earliest skyscrapers. It is architecturally significant as the first high-rise to use a system of internal portal arches to brace it against strong winds. Originally built as an office building, it underwent a comprehensive renovation in 2015 and was converted into housing aimed primarily at students. The facade also served as a backdrop for the television series Kolchak: The Night Stalker. The landmark-protected building is located on South Dearborn Street, directly across from the Harold Washington Library.