Two kilometers north of Laudun-l'Ardoise, Camp de César is an 18-hectare archaeological site among the most important in the region. On a limestone terrace located 200 meters above the Rhone valley the Gallo-Roman Oppidum presents vestiges of five successive periods of occupation from the Iron Age to the Middle Ages. Located in a belvedere, it offers a remarkable point of view. Many remains have been uncovered during the excavations: forum, basilica, ramparts, craft and housing quarter, necropolises.
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.