Mississippi State is one of the few universities to house presidential papers. In May 2012, on the 50th anniversary of the founding of the Ulysses S. Grant Association, Mississippi State University was selected as the permanent location for Ulysses S. Grant's Presidential Library. President Grant's artifacts are to remain permanently at the Mitchell Memorial Library on the MSU campus. These include Grant's letters and photographs during his presidency, from 1869 to 1877. The MSU library catalogued and cross-referenced 15,000 linear feet of material. Grant's letters have been edited and published in 32 volumes by the Ulysses S. Grant Association and the Southern Illinois University Press.