Karneid Castle was probably constructed between the late 12th and early 13th centuries by vassals of the Prince-Bishopric of Brixen, an imperial estate of the Holy Roman Empire. The fortress stands perched dramatically on an inaccessible cliff face above the confluence of the Eggental and the Eisack rivers, on the historically resonant ancient border between the kingdoms of the Lombards and the Bavarii. The name 'Karneid' derives from the Latin 'cornus' meaning “horn”.
The courtyard with its fountain, the free-standing staircases and two-story loggia are especially worth noting for their picturesque quality.
Guided tours are available in the months of May, June, September and October.
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.