The Kinsey Institute is considered to have one of the largest collections of library, archival, and art materials pertaining to sex, gender, and reproduction.[36] The current collection began as Alfred Kinsey’s private research collection. To ensure its protection, Kinsey sold it to the institute for one dollar.[37] Over the years, neither state nor grant money have been used to build collections. Instead the institute uses funds obtained from book royalties and fees in addition to donations.