Smederevo, a fortress on the Danube downstream from Belgrade, was built between 1428 and 1430 during the reign of Despot Djuradj Brankovic, the last of medieval Serbia's rulers. The fortress encircled by crenelated walls and towers, was for a long time the last bastion against the Turkish assault.

Located in the southern part of Serbia, in the Ibar River Gorge, about 15 km southwest of the town of Kraljevo, Maglic Fortress is a fine example of Serbian medieval fortresses. Maglic Fortress was built in 13th century by Stephen the First Crowned in order to defend the nearby monasteries of Zica and Studenica.

Golubac Fortress was probably built in the 14th century in order to guard the entrance to the Iron Gate gorge from high cliffs overlooking the Danube. Despite the many times it has been the scene of battles, Golubac fortress is still comparatively well-preserved.

Gamzigrad-Romuliana is a fortified palace and a memorial complex of the Roman emperor from the time of the Tetrarchy, Gaius Valerius Galerius Maximianus. It was built between 297 and 311, and intended to be the residence of the emperor after the vincenalia and his withdrawal from the throne. The late Roman fortified palace of Gamzigrad - Felix Romuliana was inscribed on UNESCO World Heritage List in 2007.