Anyone doing research into the history of Ohio or its role in the Civil War, the War of 1812, or the establishment of the Northwest Territory should find this site very valuable. The Online Collection Catalog contains "more than 230,000 items in the Society's library, newspaper, manuscript, audiovisual, history, natural history, and archaeology collections." In addition, a number of valuable historical documents are available online from the society's state archives, including materials relating to the African American Experience in Ohio, 1850-1920, part of the Library of Congress's American Memory project; Ohio's role in the Civil War; and the establishment and history of the Northwest Territory. Visitors can also access past and present versions of the Ohio constitution and a Death Certificate Index of Ohioans, 1913-1937. In addition, the site features primary resources for teachers and links to exhibits and programs at the more than 60 different locations of the Ohio Historical Society.