Work on this cathedral began in 1150 and was completed in the early 13th century. It takes the form of a Latin cross and has a dome called the Torre del Gallo on account of the weathercock on the top. Take a look at the beautiful murals in San Martín's chapel that were signed by the painter, Antón Sánchez de Segovia in 1262. The impressive 12th century altarpiece is dominated by the statue of Salamanca's patron saint, La Virgen de la Vega. The altarpiece has 53 panels describing the life of Christ and the Virgin Mary, created by the Italian artist, Dello Delli in 1422. The Gothic tombs, the cloister, the chapels and the chapter house where the museum is located are all worth visiting. You have to go through the Catedral Nueva (New Cathedral) to reach the Catedral Vieja (Old Cathedral).