NBT (National Bank of Tulsa) Building

The building at 320 S. Boston was orginally the home of the Exchange National Bank. Completed in 1917, the building stood ten stories tall and was the largest bank in Oklahoma.

At right, the Exchange National Bank, looking southwest toward the corner of 3rd and Boston.

Below, the expanded building viewed from the same perspective.

Amidst a downtown building frenzy in 1929, the bank was expanded and became known as the National Bank of Tulsa.

• The top of the tower was designed as a zeppelin mooring.
• The engraving of the original name is still visible on the building's north side.
• During the 1960's, colored floodlights were reflected off the tower, with different colors signifying various weather conditions.