The BOK Tower (named for the Bank of Oklahoma; formerly known as One Williams Center) is a skyscraper in downtown Tulsa, Oklahoma. At 203 m (667 ft) in height, the 52-story tower was the tallest building in Oklahoma until surpassed by Devon Tower in 2011. It was built in 1976 and designed by Minoru Yamasaki & Associates, the same architect who designed the World Trade Center’s Twin Towers in New York City.