Château de Hohenack is a ruined castle in the municipality of Labaroche. Significant building periods were the last quarter of the 12th century, the 13th, 15th and 16th centuries. In plan view, the edifice is typical of the 12th century, constituting a polygonal curtain wall and a square keep. The castle served both military and administrative functions before being destroyed in 1655 on the orders of the King of France. During the French Revolution, the ruin was sold as national property and, until 1898, it was treated as a quarry. The castle has suffered war damage.
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.