Prozor Fortress

Prozor Fortress is a medieval fortress situated in the continental part of Split-Dalmatia County, in inland Dalmatia, just above the town of Vrlika in Croatia. From its origin as a small stronghold built by the ancient Illyrian tribe Dalmatae, it developed into a fortress in the 15th century, during the reign of Bosnian feudal lord Hrvoje Vukčić Hrvatinić.

Source: Wikipedia