What is "koznik"

Koznik Castle is a medieval castle located in central Serbia, 10 km northwest from the present day town of Brus, on a hillside of mountain Kopaonik, on the right bank in the upper flow of river Rasina. The castle was built on the top of a steep hill dominating the surrounding terrain on 920 m altitude.

Koznik is a village in the municipality of Sjenica, Serbia. According to the 2002 census, the village has a population of 27 people.