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Your Location: World North America U.S.A. Illinois Chicago One Prudential Plaza

One Prudential Plaza


One Prudential Plaza
Prudential Building


Structure in General

existing [completed]
caisson foundation
curtain wall
light brown
early modernism


commercial office
parking rail station restaurant


  • When the Prudential Building was finished it had the highest roof in Chicago. Only the statue of Ceres on the Board of Trade rose higher.
  • This was the first high-rise office building completed in Chicago since the LaSalle Bank Building in 1934.
  • Underneath the building is the Randolph Street terminal of the Metra Electric Line commuter railroad, serving the south side and south suburbs.
  • By 1956 the observation deck had already attracted a million visitors.
  • The building had a public observation deck until a new generation of much taller skyscrapers made it obsolete.
  • Initial design schemes called for two symmetrically placed side masses at the lower floors; instead the western bustle was eliminated and the eastern one heightened to open the building towards Michigan Avenue.
  • The facade is made of vertical strips of limestone and ridged aluminum.
  • When it opened the building included one of the largest parking facilities built within an office building in the world.
  • Upon completion in 1955, the tower featured the world's fastest elevators.
  • One Prudential Plaza was built above and beyond office standards of the day and won numerous industry awards for its design.
  • The wall next to the main entrance shows a relief carving of the Rock of Gibraltar, the symbol of the Prudential Insurance Company designed by Alfonzo Ianelli.

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More Information


130 East Randolph Street

Technical Data

912.07 ft
601.02 ft
601.02 ft
13.00 ft
9.00 ft

Involved Companies


Also recorded for this building:

electrical contractor, escalator supplier, facade consultant, facade maintenance system supplier, general contractor, owner, property management, sealants & adhesives supplier, structural engineering, wind surveyor, window supplier

Features & Amenities

  • Illuminated logo on the facade
  • Pedway access is available
  • Plaza is available to the public
  • Transmission antenna on roof