Tarant noble family founded Tarantsberg castle in 1217, later named as Dorenberch and Dornsberg. The St. Ursula chapel was probably built between 1270 and 1280. From 1699 the castle has been owned by the counts of Mohr, Giovanelli and Fuhcs families.
After the end of WWII the building was damaged, but in 1964 the Gottschall family from Munich purchased the castle complex and had it restored with the utmost effort. Still today this castle is in possession of this family and cannot be visited.
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.