This impressive 16C Renaissance collegiate church dominates the town. The three aisles of the church open onto an apse and a series of Baroque chapels housing masterpieces that include Jesus of Nazareth by the "divine" Morales; a Christ of Mercy by Juan de Mesa; and a Calvary, a marvellous canvas by José de Ribera. In the sacristy, admire the four paintings by Ribera belonging to the collegiate church. A visit to the ducal pantheon is also a must.