The BOK Tower (formerly One Williams Center) is a skyscraper in downtown Tulsa, Oklahoma. At 203 m (667 ft) in height, the 52-story tower is the tallest building in Oklahoma. It was built in 1975 and designed by Minoru Yamasaki & Associates, the same architect who designed the World Trade Center in New York. This structure is very similar to the WTC towers in appearance and construction. The BOK Tower's lobby with the big marble walls and wall hangings are also very similar to the decor that was in the WTC. As of August 2006 the BOK Tower is undergoing $16 million in repairs and renovations. About $6 million is going toward renovated pedestrian bridges, granite coating for the base, new fitness centers and windows. The remaining $10 million is being used to fix damage from a flood in December.