The Cathedral of Saint Mary of Bayonne is the seat of the former Bishops of Bayonne, now the Bishops of Bayonne, Lescar, and Oloron. The cathedral is in the Gothic architectural tradition.
The site was previously occupied by a Romanesque cathedral that was destroyed by two fires in 1258 and 1310. Construction of the present cathedral began in the 13th century and was completed at the beginning of the 17th, except for the two spires which were not finished until the 19th century. The structure has been much restored and refurbished, notably by Émile Boeswildwald, architect to the French government in the 19th century, and a pupil of Eugène Viollet-le-Duc.
The cathedral stands on the Pilgrimage Way of Santiago de Compostela.
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.