This medieval fortress guards a monastery near the border of Serbia and Montenegro. First mentioned in 1444, Mileševac Fortress is believed to have been erected during the reign of Stefan Vladislav in the early 13th century. Perched upon a massive rock formation, the fortress enjoyed favorable defenses from all sides, thanks to the steep and impassable cliffs that surround it. The remains of the Mileševac Fortress still stands above the monastery as a symbol of Serbian medieval heritage.