Mission San Luis Rey History [Source: www.sanluisrey.org]
Founded in 1798 by Padre Fermín Francisco de Lasuén, successor to Padre Junipero Serra, Mission San Luis Rey was named after St. Louis IX, King of France, who lived during the 13th century. Prior to Spanish occupation, the Luiseño Indians inhabited this area for hundreds of years. The Cemetery has been in continuous use since the founding of the Mission in 1798 and continues to be the oldest buried ground in North San Diego County still in operation. The Mission Church has been there since 1815.
From 1847-1857 the Mission was used as an operational base by United States soldiers. Notable figures that served at the Mission include General Stephen W. Kearny, Kit Carson and the Battalion of Mormon Volunteers. In 1850 California became part of the United States, and the Catholic Bishop in California petitioned the U.S. government for the return of the missions. In 1865 Mission San Luis Rey was returned to the Catholic Church by Abraham Lincoln.