Cathedral of Santa María de Tudela

The organisation of the collegiate church resulted in the establishment of a regular community following the rule of Saint Augustine. The first prior of this house was Bernardo. Around 1124, Alfonso the Battler endowed the collegiate church with goods and revenues, many of which came from the old mosques. Both this collegiate church and the other churches in the city were subject to the bishopric of Tarazona, even though the territory was within the limits of the kingdom of Navarre, a fact that caused differences and disputes between the Aragonese and Navarrese estates over the years. Pope Innocent III placed the site under the protection of the Holy See.

The collegiate church, and later cathedral of Tudela, was built between the 12th and 13th centuries, beginning with the apse. It is a building with three naves and a transept, with five apses, the central one being the widest. It also has other chapels that were added over time. To the west of the church is the door of the Last Judgement, a large work made up of sixteen columns with capitals, located on either side of the doorway (eight on each side), joined by slightly pointed archivolts, which are fully decorated. The work has Gothic features and probably dates from the first half of the 13th century. The north portal has six columns with historiated capitals, three at each corner. The slightly pointed archivolts are decorated with vegetal decoration. It dates from the beginning of the 13th century. The south doorway is sheltered under a porch. It consists of three columns with capitals at each corner and has semicircular archivolts with geometric decoration. It should be dated to the end of the 12th century.