Limes Alutanus, Roman frontier defence system in Dacia, Romania

The Limes Alutanus is a Roman frontier defense system that runs along the Olt River in Dacia and consists of several fortified camps, watchtowers, and defensive walls. The archaeological remains spread across different locations and reveal the military infrastructure of this ancient border region.

The Romans built this defensive line starting in the 2nd century to secure the eastern border of Dacia against intruders. Over time, the installations were expanded and rebuilt multiple times to meet changing military needs.

The name Limes Alutanus is not ancient but a modern convention; Grigore Tocilescu first used it in 1900 for the Roman road along the lower and middle Olt. The line was long attributed to Emperor Hadrian, and Vasile Pârvan first mapped the seven camps later confirmed by archaeology.

The forts and earth rampart follow the Olt River from Cincșor and Boița in the north down through Câineni, Racovița, Călimănești and Drăgășani. The sites are scattered and mostly unmarked, so plan your own route between villages. At Arutela near Călimănești the excavated fort layout is the easiest to make out on the ground.

The name Limes Alutanus is not ancient: it was first used in 1900 by Grigore Tocilescu to describe the Roman road along the lower and middle Olt. The line was ordered by Hadrian, and in 249–250 the Goths broke through it and destroyed the camp at Slăveni, whose last coins date to 258.