It is significant for its role in the history of the Chamorro people and their effort to end the dominant military rule of the United States Navy in 1950.[2] The legislature moved to a new location in 1989 and two wings of the building were taken down; the building was then converted to house government offices.[2] In December 2016, a restoration and energy efficiency upgrade of the Congress Building was completed, allowing the Legislature of Guam to reconvene in the building from January 2017 onwards, returning Senators to the historic structure full-time after a 27-year absence.[3]