The Romanesque-style temple was begun in 1219 and completed during the 13th and 14th centuries. The initial structure of the cathedral had three apses; the main and two smaller. The current cathedral is a building with three naves. with a ribbed vault over pointed arches. The façade of the temple is made up of three large ogives corresponding to the three naves. The western façade has a 14th-century rose window 5 metres in diameter with polychrome stained-glass windows. It is flanked by two impressive towers. decorated with heraldic motifs. Inside you can find the Museum of Sacred Art. whose works are exhibited in the lateral naves of the temple. The main altarpiece. a work by Fernando de Terán. is rococo. with neoclassical columns. It has two bodies. the first with the Assumption of the Virgin and the second representing the mystery of the Holy Trinity. During the Middle Ages. a stone choir was built which was replaced at the beginning of the 16th century by a wooden choir. In this century the ambulatory was also built and at the end of the century the sacristy. The cloister dates from the 17th century and has a square floor plan with round arches and Doric columns. It was rebuilt by Diego Ibáñez Pacheco. In the 18th century the façade was renovated and the towers were incorporated. The cathedral has several styles due to successive expansions and renovations over time. It was built on Romanesque bases. although it underwent Baroque expansions. In the main door and the main apse you can see its Romanesque origins. On the other hand. both the transept and the sacristy are in Gothic style. as well as the rose window on the western façade. The cloister. renovated at the beginning of the 17th century. is in a classic style. In the centre there is a Gothic calvary. which probably belonged to the primitive cloister.