Although the first written mention of the Zniev or Turiec Castle (castrum Turuc) is from 1243, archaeological excavations prove the existence of a fortified settlement as early as the 11th – 12th century. According to a document issued in 1253 by King Bela IV the castle was refortified by Ondrej Forgáč, who apart from other loyal deeds managed to save king´s life after the defeat of the royal army by the Tartars near the river Slaná, when he gave a very fast horse to the king to escape.
That is why the legend says the Zniev castle gave refuge to Bela IV from the Tartars. Forgáč had the castle reconstructed and had a new habitable tower called 'Forgač´s tower' built in 1241-1242 in the distance of 250 metres from the castle. In January 1243 the King and the royal family paid visit to the castle. The castle was a seat of the Turiec region form the middle of the 13th century till approx. 1339 when the Turiec County became separated from the Zvolen County and the task of its administrative centre was passed to the Sklabiňa Castle because of its better strategic position. In 1312-1321 the Zniev castle was owned by the powerful noble Matúš Čák of Trenčín.
The castle, however, gradually lost its importance, changed its name from Turiec to Zniev and became the property of the Premonstratesians. In the following period it constantly passed through various owners until it was in 1532 forcefully seized by the royal army after it had fallen, thanks to a betrayal, into the possession of the Kostka family fighting on the side of Ján Zápoľský. At the beginning of the 18th century an archive was kept there.
References:Carlsten is a stone fortress built on the orders of King Carl X of Sweden following the Treaty of Roskilde, 1658 to protect the newly acquired province of Bohuslän from hostile attacks. The site of Marstrand was chosen because of its location and its access to an ice free port. Initially a square stone tower was constructed, but by 1680 it was reconstructed and replaced by a round shaped tower. Successive additions to the fortress were carried out, by the inmates sentenced to hard labour, until 1860 when it was reported finished. The fortress was decommissioned as a permanent defense installation in 1882, but remained in military use until the early 1990s.
The fortress was attacked and sieged twice falling into enemy hands. In 1677 it was conquered by Ulrik Frederick Gyldenløve, the Danish military commander in Norway and in 1719 by the Norwegian Vice-Admiral Tordenskjold. At both occasions the fortress was returned to Swedish control through negotiations and treaties.