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 Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.