What began as Exchange National Bank underwent several name changes through the years after its formation. When it became the National Bank of Tulsa it was widely referred to as "The Oil Bank of Amerca."
In 1928, it built a skyscraper on Boston Avenue between Third and Fourth Streets. NBT was the first bank in the U.S. to have a petroleum engineering department.
As featured in “Tulsa: Oil Capital of the World" written by James O. Kemm and published by Arcadia Publishing, best known for its iconic "Images of America" series, which chronicles the history of small towns and downtowns across the country.