 The Apponyi fortress is an ancient hillside castle that may have been first built under the Great Moravian Empire and took a high medieval shape in the 13th century.It once belonged to Matthew III Csák, and subsequently to the King's Demesne for most of the 14th century.It was granted to the family in 1392 by Sigismund of Luxemburg, following which they took up the Apponyi name.