The Petrovaradin Fortress, the second largest in Europe, is situated in the city of Novi Sad, on the banks of the Danube.
Near the city of Kraljevo, on a narrow plateau on top of a rocky ridge by the river Ibar, stand the remains of the medieval city of Maglič.
On the rocky, cone-shaped hill overlooking Kosovska Mitrovica stand the remains of the fortified city of Zvečan. It is unknown who built this fortification or indeed when it was built. The first mention of it is found in the 11th century, when it was ruled by Serbian grand princes.
On Gradina hill near the city of Novi Pazar stands Stari Ras, a 12th century fortress.
Emperor Trajan is known for his lasting and praiseworthy building feats.
The city of Smederevo, on the right bank of the Danube, boasts a magnificent fortress built in the 15th century. Erected as a defence against Turkish invasion, this fortress is the last major achievement of Serbian medieval military architecture.
Niš Fortress is a well-preserved Turkish fortress from the 18th Century situated at the very heart of the city of Niš, on the bank of the river Nišаva.
At the very heart of the Serbian capital city, where the river Sava meets the Danube, towers a monumental fortress from which modern Belgrade originally emerged.
The great diversity of building styles and architecture found in the medieval monasteries scattered all over Serbia demonstrates the various influences on its architecture and art, as well as on the Serbian state.