The Pacific Tower, formerly the Pacific Medical Center, is a 16-story building on Beacon Hill in Seattle, Washington. It is located at 1200 12th Avenue South. It was completed in 1932 and opened in 1933 as a Marine Hospital Service facility. The lower floors of the facility still function as a medical center today. Amazon.com occupied much of the building as its headquarters for several years. Much of the space was left vacant after Amazon relocated to South Lake Union.