The rather ordinary-looking Iglesia de San Martín was built in the 1600s and is today run by the French Redemptionist Fathers. Inside is an art museum, with at least 30 paintings beneath the choir depicting the Virgin Mary and the 12 Apostles. The Virgin on the altarpiece wears clothing woven from silver threads. San Martín is outside the center and is sometimes closed, so phone before traipsing out here.