The National McKinley Birthplace Memorial Library and Museum is the national memorial to President William McKinley located in Niles, Ohio. Also known as the McKinley Memorial Library, Museum & Birthplace Home, the Memorial is a 232 foot by 136 foot by 38 foot marble monument with two wings. One houses the McKinley Memorial Library, which is a public library. The second wing features the McKinley Museum, with exhibits about President McKinley, and an auditorium.