Gerber/Hart Library and Archives
The Gerber/Hart Library and Archives (or "The Henry Gerber–Pearl M. Hart Library: The Midwest Lesbian & Gay Resource Center"), founded in 1981, is the largest circulating library of gay and lesbian titles in the Midwestern United States. Located in Chicago's Rogers Park neighborhood, it houses over 14,000 volumes, 800 periodical titles, and 100 items in the archival collection.
Source: Wikipedia — Gerber/Hart Library and Archives (CC BY-SA 4.0)