As Chicago School architects, Holabird and Roche sought to reveal the character of the steel skeletal structure while cladding their buildings with an appropriate surface. The 17-story steel frame building is sheathed in Bedford limestone on the first three floors and by gray brick and terra-cotta above that. A two-story colonnade runs along the 15th and 16th floors with a cornice crowning the 17th floor. Oriel windows project from every corner of the building from the third story to the cornice. These rounded corner bays, a feature of many early skyscrapers, enliven the silhouette of this commercial structure. The design's unity derives from the repetition of Chicago windows along the second floor and in the center bay of the north facade. The Old Colony Building's continuous vertical piers divide the building's long Dearborn Street facade into tall, narrow sections, while continuous horizontal spandrels serve to visually widen the narrow Van Buren Street facade. The Old Colony Building was designated a Chicago landmark in 1978. Source: www.ci.chi.il.us/Landmarks/O/OldColony
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Archivision Inc. (all images copyright Scott Gilchrist / Archivision.com)