What was the Buffalo stamp in 2001?

The Buffalo stamp issued in 2001 was part of the United States Postal Service's "Celebrate the Century" series. It commemorated the 1901 Pan-American Exposition held in Buffalo, New York, which showcased advancements in technology and culture. The stamp featured an image of the iconic Electric Tower, a symbol of the fair, reflecting the city's historical significance and its role in the development of the American West.