The Catedral Nueva's largely Romanesque predecessor, the Catedral Vieja is adorned with an exquisite 15th-century altarpiece, with 53 panels depicting scenes from the lives of Christ and Mary, topped by a representation of the Final Judgment – it's one of the most beautiful Renaissance altarpieces outside Italy. The cathedral was begun in 1120 and remains something of a hybrid: there are Gothic elements, while the unusual ribbed cupola, the Torre del Gallo, reflects a Byzantine influence. The cloister was largely ruined in the 1755 earthquake, but the Capilla de Anaya houses an extravagant alabaster sepulchre and one of Europe's oldest organs, a Mudéjar work of art dating from the 16th century. The entrance is inside the Catedral Nueva.