Fortresses and fortifications

A 13th-century Romanesque church with a richly carved portal, enclosed by a double ring of walls in the Hârtibaciu valley, with the Făgăraș Mountains behind.

The ruins of the Roman and Byzantine fortress near Isaccea, main base of the Danube fleet Classis Flavia Moesica, with stone-and-brick walls uncovered on the banks of the Danube.

The fortress of the Fifth Legion Macedonica on Dealul Cetății in Turda, with its restored headquarters building and baths, open to the public since 2026 and part of the UNESCO site of the Dacian frontier.

A medieval church with a Romanesque nave and a Gothic sanctuary, enclosed by a wall with a gate tower on the terrace above the Olt. It keeps fragments of medieval frescoes.

A Gothic basilica from the second half of the 14th century, with a gate tower and enclosure walls, known for the Green Man and the other faces carved in stone inside.

A Roman fort on the Măgura plateau, south-east of Ilișua village, built on the northern frontier of Dacia Porolissensis; at ground level the ruins of the baths from the civil settlement are what you mainly see.

A defensive tower in Sebeș's town fortifications, built by the tailors' guild at the end of the 14th century and tied to the story of the student who survived the Ottoman siege of 1438.

The ruins of ancient Troesmis near Turcoaia: the base of the Fifth Legion Macedonica, then two Late Roman fortresses on the high bank of the Danube. An undeveloped site with free access.

A Roman-Byzantine fortress of the 4th–6th centuries in central Dobruja, with 13 towers, an early Christian basilica and ruins uncovered by Vasile Pârvan in 1911–1914.

The best-preserved bastion of Brașov's city walls, built by the weavers' guild in the 15th and 16th centuries, with timber galleries on four levels and a model of the medieval town.

The Evangelical church in the centre of Agnita, with a bell tower over 40 m high and four guild towers around it, surviving from the former ring wall; the ticket includes an exhibition in the towers.

A Saxon church on a hill in Apold, surrounded by walls and defensive towers that survive almost complete, with Gothic frescoes on the triumphal arch and contemporary art exhibition spaces.

The fortress of the 13th Legion Gemina beneath the citadel of Alba Iulia: the partly rebuilt south gate, the legion's headquarters preserved in the Principia Museum and a stretch of Roman road.

A 14th-century Gothic hall church with its bell tower raised above the choir, surrounded by an oval wall whose former food stores now house a museum and guest rooms.

The ruins of a Dacian fortress on the rocky summit of Piatra Cetății, above the DN66, which guarded the southern approach to Sarmizegetusa Regia; a UNESCO site, reached only on foot by a steep climb.