The castle was probably erected at the end of the 13th century, by the knight Balogovcov family (Hungarian: Balog). Before 1312, in unknown circumstances, the stronghold passed into the hands of the great magnate Matthew III Csák. He had a dispute with the king, Charles I of Hungary, ended with the death of the magnate in 1321, during the siege of Trenčín by the royal army. At that time, Charles I gave Blh again to the Balogovcov family, but from 1323 until the mid-15th century the castle belonged to the noble Sečovcov family. At the beginning of the fifteenth century, the owners of Blh were friendly to the Catholic Jan Jiskra, through which the castle was conquered and occupied by the Hussites. After 1460, Stefan Rozgoň took over and leased it from the king for 12,000 golds, but in 1481 the Sečovcov family returned to the castle. After the occupation of Fiľakovo by the Turks in 1554, the former commander of the crew fled to Blh, where he died as a result of wounds. Sečovcovs owned the castle until 1646, when, by marriage, it became the property of a palatine and anti-Habsburg conspirator, Francis Wesselényi. Apparently, he strengthened the defense of the castle, but during the Imre Thököl’s anti-Habsburg uprising in 1677, it was conquered, destroyed and abandoned.
The castle occupied a rather large area of the flattened hill ridge with dimensions of approximately 150 × 70 meters. Around the small core of the stronghold, which occupied the upper part of the central rock, there were two circumferences of stone defensive walls with a thickness of 1.8-2 meters. In the middle a small residential building or tower was erected, below there was a stone water tank.
The castle has not survived to the present day, only small relics of the walls, fragments of the vaulted room or basement and densely overgrown remains of defensive walls are visible. Admission to the forested area of the castle may be difficult, as it is an area of a hunting club.
Bóna M., Plaček M., Encyklopedie slovenských hradů, Praha 2007.
Wasielewski A., Zamki i zamczyska Słowacji, Białystok 2008.