2022 Euromed Postal - Ancient Cities of the Mediterranean, Ajdovscina - D - Set

In the 3rd century, the Roman fortress of Castro was built along the itinerary road leading from Aquileia (Aquileia) to Ljubljana (Emona). It was located at the confluence of Hubelj and Lokavšček, in the area of ​​an older Roman settlement, and was an important administrative and commercial center of the Vipava Valley. Castro Fort was irregularly oval in shape with mighty walls and at least 14 towers. Castra held a supply and command function with a permanent military garrison within the prison walls (claustra Alpium Iuliarum) that guarded the northeastern border of Roman Italy.