Reichenberg Castle may have been built around 1150, but it was documented first time in 1307. It was enlarged in the late 14th century and Gothic chapel of St. Michael was also added then.
The old castle was rebuilt in the early 16th century, it was besieged in 1622 and rebuilt again in 1723. Later it was left to decay. Today it is used by Christian Reichenberg Fellowship community.
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.