description Aon Center Chicago Overview
The Aon Center is an 83-story, 346-meter skyscraper in Chicago, Illinois, completed in 1973 as the Standard Oil Building. Designed by the architectural firms Edward Durell Stone and Perkins and Will, the tower was originally sheathed in Carrara marble. However, the marble cladding was replaced with granite in the early 1990s due to weathering and structural concerns. It stands as one of the tallest buildings in the Chicago skyline and serves as a major commercial office property.
help Aon Center Chicago FAQ
What was the Aon Center in Chicago originally called?
The building opened in 1973 as the Standard Oil Building. It later became known as the Amoco Building before taking the Aon Center name.
How tall is the Aon Center?
The Aon Center is an 83-story tower about 346 meters tall. It stands in Chicago's East Loop and was one of the world's tallest buildings when completed.
Why was the Aon Center's marble facade replaced?
The original Carrara marble cladding proved vulnerable to Chicago's weather and temperature changes. Between 1990 and 1992, the building was refaced with white granite from Mount Airy.
Who designed the Aon Center?
The tower was designed by Edward Durell Stone in association with Perkins and Will. When it opened in 1973, it was the second-tallest building in Chicago.
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