My mission today is used as a parish church . It is also used as a retreat center . Mexico went to war with Spain in 1821 and won the land of Alta California . Mexican government closed down the mission and people let the buildings be ruined . Later U.S.A went to war with Mexico and C.A. became a state in 1850 . In the 1880's , Californians began to rebuild the mission buildings . The mission has an impact on California today by having people come to masses on Saturday's . They also have people coming as if it was a minerature museum . So technicly mission San Luis Rey De Francia is still an active and alive mission . They changed the economy, brought Christianity, diseases, and new languages . The missions brought new architechture to C.A. .