Built in the 1st centuries B.C. and A.D. under Dacian rule, these fortresses show an unusual fusion of military and religious architectural techniques and concepts from the classical world and the late European Iron Age. The six defensive works, the nucleus of the Dacian Kingdom, were conquered by the Romans at the beginning of the 2nd century A.D.; their extensive and well-preserved remains stand in spectacular natural surroundings and give a dramatic picture of a vigorous and innovative civilization.

Criterion (ii): The Dacian fortresses represent the fusion of techniques and concepts of military architecture from inside and outside the classical world to create a unique style.

Criterion (iii): The Geto-Dacian kingdoms of the late 1st millennium BC attained an exceptionally high cultural and socio-economic level, and this is symbolized by this group of fortresses.

Criterion (iv): The hill-fort and its evolved successor, the oppidum, were characteristic of the Late Iron Age in europe, and the Dacian fortresses are outstanding examples of this type of defended site.