The William McKinley Presidential Library and Museum is the presidential library of 25th U.S. President William McKinley. The library is owned and operated by the Stark County Historical Society, and located in Canton, Ohio, where McKinley built his career as lawyer, prosecuting attorney, congressman, governor and president.
The rotunda next to the library is the gravesite of President McKinley.
http://en.wikipedia.org/wiki/William_McKinley_Presidential_Library_and_Museum