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A tower for downtown Seattle
Columbia Center was developed by Martin Selig and designed by Chester L. Lindsey Architects. Work began in 1982, and the tower was completed in 1985. It first took the name Columbia Seafirst Center, after Seafirst Bank, its largest tenant.


Height, and its limits
An earlier design would have risen to about 1,006 feet, but federal aviation rules near Seattle–Tacoma International Airport did not allow that height. The tower was built with 76 storeys and an architectural height of 933 feet, and it has been the tallest building in Seattle and in Washington state since 1985.
The observatory on the 73rd floor
The observatory occupies the 73rd floor, 902 feet above the city. It was remodelled in 2013 into a 360-degree viewing area and renovated again in 2018, with two express elevators and a new lounge. The building has been called Columbia Center since November 2005.


