The Spanish Missions of Arizona and Sonora
The Spanish missions in the Sonoran Desert were a series of Roman Catholic religious outposts established by Spanish religious orders for the conversion of the Pima and Tohono O'odham, indigenous peoples, residing in the Sonoran Desert. The missions provided Spain a presence in its frontier territory of the Sonora and Sinaloa Province in the Viceroyalty of New Spain.
The missions were in an area of the Sonoran Desert called Pimería Alta and Pimería Baja This area now spans the international border between Sonora, Mexico, and Arizona, United States.
The Arizona and Sonora MIssions