St.Nazaire cathedral is te main sight in Béziers. This grandiose Romanesque cathedral dates from the 13th century. It was erected on the site of an earlier building which was destroyed during the Massacre at Béziers in the Albigensian Crusade. It occupies one of the best sites in town: from the concourse in front of the cathedral there are beautiful views out over the surrounding vineyards and towards the foothills of the Massif Central to the north.
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.