The Cathedral of Saint Mary of Tudela was originally a collegiate church. It became a cathedral with the creation of the Diocese of Tudela, which existed 1783-1851 and again 1889-1956. It is now a co-cathedral in the Archdiocese of Pamplona and Tudela.
Christians under Alfonso the Battler conquered Tudela in 1119. The city had been under Muslim control, although three religious communities were living there. In the aftermath of the conquest, Muslims were forced to live in a suburb outside the city walls. The city´s main mosque was handed over to the church. The site was designated for the construction of a church (prior to the mosque there had been a church there dedicated to Santa Maria la Blanca). Construction began on a collegiate church in 1168.
The architectural style initially used was Romanesque. Among the treasures of the church, are the three Romanesque portals with elaborate sculptural decoration. The North door is called the Portal de Santa Maria, while to the South is the Portal del Juicio (Portal of the Last Judgement).
The nave and chapels was rebuilt in Gothic-style. Construction lasted until the 13th-century.
The main chapel has a retablo (reredos) by 15th-century artists consisting of 18 panels of the Life of Jesus and Mary, and others depicting prophets and apostles. The sculpture of the Assumption of the Virgin (1606) is by Juan Bascardo.
The central choir was completed by Esteban de Obray in Gothic style. The organ was made in 1759 by Lucas de Tarazona of Lerín.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.