Documents related to one of the Wild West's most famous lawmen will soon be on display at a state park in Tombstone.

Wyatt Earp, best known for the role he and his brothers played in the O.K. Corral gunfight of 1881, is the focus of a collection of letters, photographs and other documents recently donated to Tombstone Courthouse State Historic Park, Arizona State Parks and Trails said in a news release.

The documents include handwritten letters from Earp's wife, Josephine, to Earp and others, along with notes from interviews with the lawman and photos of Earp and his wife. According to Arizona State Parks and Trails, they've never been shown in public. They'll be processed into the park's archives and then be put on display sometime in 2018.

The agency's executive director, Sue Black, said the collection "will open the door to the past and make Tombstone Courthouse State Historic Park an international destination."

As its name suggests, the park is located in the old Victorian-style courthouse, constructed in 1882. It housed Cochise County's offices until 1929, when Bisbee replaced Tombstone as the county seat; the last county office left the courthouse in 1931. It opened as a state park in 1959 and was added to the National Register of Historic Places in 1972.