The Aon Center is a Modernist office skyscraper at 707 Wilshire Boulevard in downtown Los Angeles. It was originally the United California Bank Building and later the First Interstate Tower. Charles Luckman was the architect. Excavation began in late 1970, and the tower was completed in 1973. It rises 858 feet to the roof.
The design is rectangular, bronze-clad with white trim, and unusually slender for a seismically active area. Thirty elevators serve it. It was the tallest building in California from 1973 to 1986, and the tallest in Los Angeles until 1989.
A fire began on the 12th floor on May 4, 1988, and burned for about four hours. It destroyed five floors. The building lacked sprinklers, and Los Angeles then required sprinklers in all high-rises. Shorenstein bought the building in 2014.
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