Mission San Xavier del Bac is a historic Spanish mission located near Tucson, Arizona. Founded in 1692 by Father Eusebio Kino, it is one of the oldest European structures in the United States. The mission is known for its stunning Baroque architecture and beautiful interior murals, which reflect the cultural blend of Native American and Spanish influences. The mission serves as a center for the Tohono O'odham people and continues to be an active parish. It is often referred to as the "White Dove of the Desert" due to its striking white exterior and serene setting. Today, it attracts many visitors interested in history and architecture.