Structure in General
- The top of the building is oriented toward the lakefront, and is often said to resemble a sailboat.
- The building was originally planned to be 5 stories taller.
- Located at the northwest corner of Grant Park, on the former site of the John Crerar Library.
- The southeast section is cut away at the base, except for a triangular column containing a public stairway to the nearby Metra train station.
- The diamond-shaped slope is outlined with white light bulbs. Around holidays they used to be replaced with colored lights.
- The official count of 41 floors does not include 5 levels of unused space in the narrowest portion at the top of the diamond.
- The building appears to be split diagonally down the middle. The right and left sides are slightly disjointed, and at the top they are actually separated by a gap.
- The building's designer was Sheldon Schlegman of A. Epstein & Sons.
- Originally planned as One Parke Place, this was billed as the world's first computerized office building.
- The service cores are rotated 45° from the street grid, producing diagonally-oriented office floorplans which take advantage of the extraordinary southeast views.
- On special occasions the windows inside the diamond are lit in patterns spelling short messages or sports team names.
- A sculpture by Yaakov Agam used to occupy the triangular niche at street level. Called "Communication - X9", its colorful geometric patterns would change when the viewer walked past.
- This building was featured prominately in the 1987 motion picture "Adventures in Babysitting" starring Elisabeth Shue.
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Also recorded for this building:
developer, electrical connections, general contractor, property management, safety consultant, structural engineering, tenant
Features & Amenities
- One of the city's famous buildings
- Ornamental illumination is installed