St. Louis Public Library (SLPL) - 16 BranchesOriginally established in 1865 as the Public School Library Society of St. Louis, a subscription Library open only to paying members. In 1874, it opened to the public for reference and reading on the premises. The St. Louis Public Library has 16 locations across the city. Its mission is to provide learning resources and information services that support and improve individual, family and community life through a variety of programs, services and initiatives.