Zwernitz Castle was originally the hereditary seat of the Walpodes of Upper Franconia. The keep and the tithe barn made of rusticated ashlars are part of the original Romanesque complex built in 1200. In 1338 the castle came into the possession of the Hohenzollern family. Around two centuries later the half-timbered buildings of the lower castle were added. When the rock garden was laid out, it was designed to incorporate a view of the castle located on a natural elevation above it.
An interesting exhibition in the castle complex documents the history of Zwernitz Castle, its inhabitants, and Sanspareil. From the keep there is a magnificent panoramic view of the Franconian Switzerland Natural Park.
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.