320 South Boston Building

320 South Boston Building
Former names	Exchange National Bank Building
Alternative names	National Bank of Tulsa Building
General information
Status	Complete
Address	320 South Boston
Town or city	Tulsa, Oklahoma
Country	USA
Construction started	1910
Completed	1929
Height
Height	400 feet
Top floor	22
Design and construction
Architect	George Winkler

320 South Boston Building in 1959, formerly known as the Exchange National Bank and the National Bank of Tulsa Building. Photo taken from the corner of Third Street and Cincinnati Avenue.

The 320 South Boston Building, formerly known as the National Bank of Tulsa Building, is a 22-story highrise building located in downtown Tulsa, Oklahoma. It was originally constructed at the corner of Third Street and Boston Avenue as a ten-story headquarters building for the Exchange National Bank of Tulsa, Oklahoma in 1917, and expanded to its present dimensions in 1929.^[1][2] The addition brought the building's height to 400 feet (122 m), making it the tallest building in Oklahoma.^[1] It lost this distinction in 1931, but remained the tallest building in Tulsa until Fourth National Bank (today Bank of America Center) was completed in 1967.

In 1933, Exchange National Bank reorganized and renamed itself as the National Bank of Tulsa. Thereafter, the building was known as the National Bank of Tulsa Building (or NBT Building), until the bank renamed itself as Bank of Oklahoma (BOK). The BOK moved to its newly-constructed BOK Tower in 1977. The NBT Building reverted to its former 320 South Boston Building name and became a general office building.

Like the Empire State Building, the pinnacle of 320 South Boston was designed as a Zeppelin mooring. This was used at least once when a U.S. Navy Zeppelin moored there in the 1930s. The top of the building was illuminated for weather alerts, with flashing red lights in the event of an approaching storm.^[3][4]

The architect was George Winkler, who also designed the Mayo Hotel.^[1]

Notes

1. ^ ^{a b c} Historic Tulsa: The Bank at 320 South Boston,[1]
2. ^ Emporis
3. ^ http://www.tulsatvmemories.com/weather.html#nbt
4. ^ Underwood, Bill (February 26, 1997). "320 South Boston." Tulsa World.

External links

• official site
• Emporis

Coordinates: 36°09′11″N 95°59′23″W / 36.1530°N 95.9898°W / 36.1530; -95.9898

Preceded by Philtower Building

Tallest Building in Tulsa 1928—1967 122m

Succeeded by Bank of America Center