The first written mention of the castle of Potštejn is from the late 13th century. The castle was conquered only once in history, in 1339 by Charles IV before he became king. The village below the castle was first mentioned in 1350. The golden times of the castle were after 1495, when it was bought by Vilém II of Pernštejn, who had rebuilt it.
In the 17th century, economic decline came, the castle fell into disrepair, and the entire Potštejn went bankrupt. In 1746, the estate was bought by the nobleman Jan Ludvík Harbuval Chamaré, who had built here a château. After the House of Chamaré died out in the mid-19th century, Potštejn was acquired by marriage by the Dobřenský of Dobřenice family. They owned it until 1945, when their properties were confiscated.
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.