ONE National Gay & Lesbian ArchivesONE is the oldest existing lesbian, gay, bisexual, and transgender (LGBTQ+) organization in the United States, and one of the largest repositories of LGBTQ+ materials in the world. Located in Los Angeles, California, ONE Archives is a part of the University of Southern California Libraries. The various collections contain over two million items including periodicals; books; film, video and audio recordings; photographs; artworks; ephemera, such as clothing, costumes, and buttons; organizational records; and personal papers. ONE Archives also operates a small gallery and museum space devoted to LGBT art and history in West Hollywood, California.