The Roman temple of Château-Bas is a Roman ruin located to the east of Vernègues, in the park of the “Château-Bas” wine estate located along the road connecting Vernègues and Cazan. It dates from the late 1st century BC.
The temple, located in the center of a semicircular sacred enclosure, is today reduced to a few ruins. A large fluted column is surmounted by a capital with acanthus leaves. A smooth pilaster is located at the corner of the cella (closed part of the temple) and surmounted by a square capital with acanthus leaves.
A Romanesque chapel of modest dimensions (Saint-Cézaire chapel in Château-Bas) leans against the eastern wall of the Roman temple, partially reusing it.
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.