Horneck castle was built around 1200 and was given to the Teutonic Order by Konrad von Horneck in 1438, thereby making it the seat of the 'Deutschmeister' (German Master) until it was destroyed in 1525 by fire during the German Peasants' War. Despite reconstruction shortly after Horneck Castle's destruction, Mergentheim became the new headquarters for the Teutonic Order in that region in 1527.
As of 2006, the castle was occupied by an altenheim (a nursing home for the elderly) as well as the Transylvanian Museum (dedicated to the protection, preservation and documentation of the cultural heritage of the Transylvanian Saxons and of their coexistence).
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.