Cincinnati Historical Society Library
Located in the Cincinnati Museum Center, this library is a collection of historical information about Cincinnati and the region. Since 1831, they have been collecting and preserving materials relating to the Greater Cincinnati area, the state of Ohio and the Old Northwest Territory.
The library is free and open to the public from noon-4 pm on Thursdays and Fridays by appointment only.
Today, it houses one of the most significant regional history collections in the United States with thousands of books, pamphlets, maps, manuscripts, photographs and films.