The Guam Museum, formally the Senator Antonio M. Palomo Guam Museum & Chamorro Educational Facility, is a museum focusing on the history of Guam, a U.S. territory in Micronesia. A permanent building to house the museum's collection opened in Hagåtña on November 4, 2016. The Guam Museum had been housed in temporary locations since …The Guam Museum, formally the Senator Antonio M. Palomo Guam Museum & Chamorro Educational Facility, is a museum focusing on the history of Guam, a U.S. territory in Micronesia. A permanent building to house the museum's collection opened in Hagåtña on November 4, 2016. The Guam Museum had been housed in temporary locations since World War II.