The Gallo-Roman Theater is an ancient arena theater located in Thénac, Charente-Maritime. It is part of an ancient rural sanctuary with thermal baths and a spring. Likely constructed during Nero's reign and abandoned in the 3rd century, its remains were classified as historical monuments in 1990.
Measuring at least 84m wide, its unique architecture involves internal buttresses defining compartments, reinforcing its structure against earth pressure.
The theater is part of a rural sanctuary 5 km south of Saintes, existing since the Neolithic era. Believed to be built during Nero's time, it remained in use until at least the 3rd to 4th century. After abandonment, it served as a stone quarry. Excavations occurred in 1825-1828 by René Eschassériaux, published later by his grandson Eugene in 1880-1881. Additional excavations took place in the 1960s and 1990s, leading to its classification as a historical monument.
The arena theater, at least 84m in diameter, features an east-facing cavea with a semi-circular orchestra, built from local Campanian limestone. Semi-cylindrical buttresses reinforce the cavea's perimeter against earth pressure. Radiating vomitories divide the cavea into six sectors. Recent studies reveal a fully masoned stage wall with two passageways leading to the orchestra. The theater has been municipally owned since 2000, previously belonging to the state for 14 years.
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.