Cultural Heritage | The Roman Fortress Castra

When the Romans founded Aquileia in the early centuries BC, they had also built a road through the Vipava Valley through what is today the village Razdrto to Emona (Ljubljana). Ajdovščina grew from the postal and freight station called mansio Fluvio Frigido (by the Frigid River, today the Hubelj River) that was set up on that route. Later, in the first century AD another road was constructed toward Emona through what is today Col and Hrušica (then Ad Pirum). The second half of the 3rd century and early 4th century saw the construction of a new fort called Castra as part of the defence system on the east frontier, next to Fluvio Frigido. This fort acted as an important military centre with a permanent military crew and command.
In the vicinity of Castra, on a plain between Ajdovščina and Vipava, the famous battle between the Roman Emperor Theodosius and the usurper Eugenius took place in 394 AD. The victory of the Christian Theodosius over his pagan enemy paved the way for Christianity to become a state religion.
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