The GLBT Historical Society collects, preserves, exhibits and makes accessible to the public materials and knowledge to support and promote understanding of LGBTQ history, culture and arts in all their diversity.Our operations are centered around two sites: our GLBT Historical Society Museum, located since 2011 in the heart of San Francisco's Castro neighborhood; and our Dr. John P. De Cecco Archives and Research Center, open to researchers in the Mid-Market district.(Banner Photo by Mick Hicks, collections of the GLBT Historical Society. 1978 raising of the Original Rainbow Flag, San Francisco Civic Center).