The Wells Fargo Plaza is a high-rise skyscraper located on 100 West Washington Street in Downtown Phoenix, Arizona, United States. It opened as the First National Bank Plaza on October 25, 1971, and was later known as the First Interstate Bank Building. It is 372 feet (113 m) tall. It is designed in the Brutalist style, an architectural style spawned from the International Style. The “raw concrete” element of Brutalist architecture allows for no exterior finish which exposes the rough concrete columns and beams.