Novo Brdo Fortress, Medieval fortress in Novo Brdo, Kosovo

Novo Brdo Fortress is a medieval castle in the town of Novo Brdo, Serbia, made up of an Upper Town with a hexagonal layout and a central tower, and a Lower Town with rectangular buildings. The whole site is enclosed by walls and eight rectangular towers, with three gates providing entry and a dry moat running around the outside.

Novo Brdo Fortress was built in the late 13th century by King Stephen Uroš II Milutin of Serbia to protect the gold, silver, iron and lead mines of the area. It peaked under the Serbian Despotate (1402–1459), when it was Serbia's second most important town, home to Saxon miners, Albanian Catholics and a Ragusan merchant colony. Systematic archaeological research began in 1952; in 1948 it was declared a Monument of Culture of Exceptional Importance.

Novo Brdo means "New Hill" in Serbian; written sources also record Nowobordo, Novus Mons, Nyeberghe and Νοβόπριδον. The town's population included Saxon miners, Albanian Catholics and a Ragusan merchant colony, ruled by a vojvoda and a kefalija as seat of a Despotate administrative unit. In the suburbs east and southeast of the walls stood the miners' settlement and the Dubrovnik and Venetian traders' colonies.

The ruins sit on a hill and can only be reached on foot, so sturdy shoes are recommended since the ground is uneven and there are several levels to explore. The climb is short, but the top offers a wide view of the surrounding area.

The mines around the fortress produced a rare type of silver called glam, a natural alloy containing up to 33 percent gold. This made the settlement one of the most sought-after trading stops in the medieval Balkans.