The fortified citadel at Blaye, standing on the opposite bank of the river Gironde to Fort Médoc, forms, along with Fort Paté, the region's 17th-century defence against river attack.
Built by Vauban, together this group are named the Fortifications of Vauban and are classified as a UNESCO World Heritage Site. The site of the citadel saw its first castle in the 7th century. Vauban's fortress though was built in 1689 and took three years.
The largest of the three fortresses, Blaye has both landward and seaward defences with dry ditches dug out of the rock. He incorporated some of the existing defences into his structure to the benefit of the fort. Some elements are still inhabited today. An impressive spot offering a panoramic view.
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.