Castres Cathedral (Cathédrale Saint-Benoît de Castres), now the Roman Catholic church of Saint Benoît, was formerly the seat of the bishop of Castres, but the diocese was not restored after the French Revolution and was added by the Concordat of 1801 to the Archdiocese of Albi.
The first cathedral was built in the 14th century after the creation of the diocese of Castres in 1317, along with a number of other dioceses created in the region after the suppression of the Albigensians. It was destroyed during the French Wars of Religion.
The present building which replaced it was constructed in the 16th and 17th centuries.
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.