The Arizona Historical Society (AHS) is a non-profit organization whose goal is to collect, preserve, interpret, and disseminate the history of Arizona, the West, and Northern Mexico as it pertains to Arizona. It does this through 4 regional divisions. Each division has a representative museum. The state-wide divisions are as follows: Southern Arizona Division in Tucson, the Central Arizona Division in Tempe, the Northern Arizona Division in Flagstaff, and the Rio Colorado Division in Yuma. It was founded by the territorial legislature on November 7, 1864.