Description • Architects: Danmark Adler & Louis Sullivan / Frank Lloyd Wright
• Architect (renovation): Harry Weese Associates
• Dimensions: 110 m × 57 m
• This is the oldest surviving highrise building in the city of Chicago, was the world's tallest highrise in 1889–1890.
• The building originally was topped by an observation turret that made the building 82.3 m (270 feet) in height.
• The building was built on soggy ground, and has since settled 2.5 feet causing sloping surfaces on the ground floor.
• Designed to be a multi purpose building was entirely built with stone, had a high-class hotel & areas for offices, the year of completion was modified to have new services for the hotel like the personnel's dormitories and the dinner room (now secondary auditorium) those was built in some meters at the auditorium roof (with steel structure).
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