Kozograd castle - Credit: Wikimedia Commons
Kozograd or Old town of Kozograd (Lat.: Chossao or Cosao) is the name of a medieval fortress whose remains are located in the municipality of Fojnica, Bosnia and Herzegovina. It is an archeological site of significant historical value. Although it is one of the least explored fortresses in Bosnia and Herzegovina, it is known that in 1444 it temporarily housed the official chancery of King Tomaš, and that in 1463, after the arrival of the Ottomans, the Bosnian queen Katarina (wife of King Tomaš) stayed there before moving on to Rome. It was declared a National Monument of Bosnia and Herzegovina at a session held from November 4 to 6, 2015. The National Monument is an unexplored archeological site and consists of the remains of medieval ramparts, towers, wells and ditches in the southern portion of the fortress. Read more on Wikipedia
Source: en.wikipedia.org