Hawaiian Mission Houses Historic Site and Archives (HMH), an active site for Hawaii’s history since 1820, is a National Historic Landmark (listed in 1965) and accredited by the American Alliance of Museums (last re-accredited in 2010). HMH graces a one-acre site in the Historic Capital district in downtown Honolulu. HMH preserves Hawai‘i’s oldest Western-style house, the 1821 Mission House, as well as the 1831 Chamberlain House, the 1841 Bedroom Annex, a cemetery, a collections storage vault, a gift shop, and multi-purpose space.