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:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.