The Filson Historical Society is dedicated to preserving the history of Kentucky and the Ohio Valley Region. It has extensive collections of original manuscripts, letters, diaries, photographs, architectural records, rare imprints, books, maps, newspapers, textiles, portraits, and other three dimensional items, including a sheep horn collected by William Clark during the Lewis and Clark Expedition. The Society hosts weekly lectures, historical tours, exhibits, reading and discussion groups, weekend-long conferences, a field institute, and excursions.