Dome

Close view of the building's base; Rounded corner bays, a feature of many early skyscrapers, enliven the silhouette of this commercial structure. 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 structure is a critical component of a dramatic stretch of landmark structures along South Dearborn that also includes the Fisher and Manhattan buildings. Source: Chicago Landmarks [website]; http://www.ci.chi.il.us/Landmarks/ (accessed 1/1/2008)