The Château de Hohbarr (Haut-Barr) is a medieval castle, first built in 1100, above the city of Saverne in what is now the French département of Bas-Rhin. It was built on sandstone rock 460m above the valley of Zorn and the plain of Alsace. Because of this, it has been called the eye of Alsace.
The current castle was built in 1583 by Jean de Manderscheid. The Peace of Westphalia mandated the destruction of several castles, including Hohbarr, but after the beginning of the War of the Spanish Succession, in 1701, the fortress was back in use. It was abandoned around 1770, but the vault continued to be occupied until the French Revolution.
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.