Mission San Luis Rey is one of the 21 California missions founded by Spanish Franciscan missionaries. Established in 1798, it is located in Oceanside, California and is known as the "King of the Missions" due to its size and architectural beauty. The mission served as a center for agriculture and education for the local Native American population. The mission features a stunning church, beautiful gardens, and historic buildings that reflect the Spanish colonial style. Today, Mission San Luis Rey is a museum and a place of worship, attracting visitors who want to learn about California's history and the mission system.