1200 Fifth, formerly the IBM Building, is a 20-story office building in the Metropolitan Tract, part of downtown

Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...

, Washington, United States. The building was designed by Minoru Yamasaki, who also was architect of Rainier Tower on the corner diagonally opposite, and the World Trade Center in

New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...

. Construction on the building began in May 1963 and it was completed in October 1964. Nard Jones wrote in 1972 that "There is an architectural poetry about he buildingthat is at variance with the endless jibes at computerization and the alleged sober pragmatism of IBM personnel." The building's crown has a series of 191 "fins" that measure tall and surround the machinery floors. The corner of the complex at 5th Avenue and University Street was the site of the Seattle Ice Arena from 1915 to 1963.

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Building profile
at Unico Properties {{DEFAULTSORT:1200 Fifth (Seattle) Buildings and structures in Downtown Seattle Skyscraper office buildings in Seattle Minoru Yamasaki buildings NBBJ buildings Office buildings completed in 1964 1963 establishments in Washington (state)