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The present Romanesque church — dedicated to Saint Louis of Toulouse, whose cult had been much promoted in mediæval Europe by King Charles I of Hungary (1307–1342) — was built in 1816; it was sheathed in asbestos in 1906.
The college was named after Saint Louis of Toulouse, a saint who was an heir to the throne of Napoli, but who renounced the throne and gave it to his younger brother, and himself became a Franciscan monk, took all the Franciscan vows and served the poor, the sick and the hungry.
Named after Saint Louis of Anjou, the bishop of Toulouse, the mission is the namesake of the city of San Luis Obispo and San Luis Obispo County.