Seattle Municipal Tower is a 62-story skyscraper located at 700 5th Avenue at the corner of 5th Avenue and Columbia Street in downtown Seattle, Washington. Rising to 220.07 m (722.0 ft), it is the fourth tallest high-rise building in Seattle. At its completion in 1990, the building was named AT&T Gateway Tower and later changed to Key Bank Tower reflecting the names of former anchor tenants AT&T and Key Bank. On 17 May 2004, the tower's name was officially changed to the current moniker.
The building is attached to the Seattle Civic Center complex and is owned by the city, and houses several government offices including the Department of Planning and Development, Seattle City Light, Seattle Public Utilities, the Department of IT, Human Services Department, and the Office of Economic Development. The Seattle City Council and offices of the Mayor of Seattle are located in the nearby Seattle City Hall.