Bzovík castle structure originated by reconstruction of the Cistercian Abbey founded around 1130. Several decades later the Premonstratesian provostship moved here and became the largest feudal estate in the region of Hont. Its fort was repeatedly destroyed in the 15th century.
In 1530 it ended up in hands of Sigismund Balassa who drove out the monks and had the Romanesque monastery reconstructed to the Gothic-Renaissance castle with strong outer fortifications including four corner bastions and the dike. The fort was damaged at the end of the Second World War and reconstructed recently.
Apart from fortifications and bastions, the ruins of the former monastery and part of the Romanesque church in the courtyard survive.
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.