Founded in 1985, the GLBT Historical Society collects, preserves, exhibits and makes accessible to the public materials and knowledge to support and promote understanding of lesbian, gay, bisexual, transgender, and queer history, culture and arts in all their diversity. The Dr. John P. De Cecco Archives & Special Collections of the GLBT Historical Society are among the largest and most extensive holdings in the world of materials pertaining to LGBTQ people and organizations. Broadly speaking, the over 900 discrete collections fall into four main areas: archives, periodicals, oral histories, and arts & artifacts.