Castra Ad Fluvium Frigidum
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Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
for 'Fortress by the Cold River'), also simply (), referred to as (Castra relay station) in , was a Late-Roman fortress ('' castrum'') which constituted the centre of '' Claustra Alpium Iuliarum'', an Ancient Roman defensive system of walls and towers stretching from the Gail Valley (now
Carinthia Carinthia ( ; ; ) is the southernmost and least densely populated States of Austria, Austrian state, in the Eastern Alps, and is noted for its mountains and lakes. The Lake Wolayer is a mountain lake on the Carinthian side of the Carnic Main ...
, Austria) to the Učka mountain range (now
Croatia Croatia, officially the Republic of Croatia, is a country in Central Europe, Central and Southeast Europe, on the coast of the Adriatic Sea. It borders Slovenia to the northwest, Hungary to the northeast, Serbia to the east, Bosnia and Herze ...
). On its grounds, the Late Medieval market settlement of
Ajdovščina Ajdovščina (; ,trilingual name "Haidenschaft, Aidussina, Ajdovščina" inGemeindelexikon, der im Reichsrate Vertretenen Königreiche und Länder. Bearbeit auf Grund der Ergebnisse der Volkszählung vom 31. Dezember 1900. Herausgegeben von der K. ...
developed. The fortress was built on the grounds of an Early Roman settlement next to the confluence of the Hubelj River and Lokavšček Creek in the Vipava Valley (now in southwestern
Slovenia Slovenia, officially the Republic of Slovenia, is a country in Central Europe. It borders Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and a short (46.6 km) coastline within the Adriati ...
), along the road Via Gemina from Aquileia to Emona, in the early 270s. It had a permanent military crew and command. In ancient sources, it is related to the Battle of Frigidus, between the army of the Eastern Emperor
Theodosius I Theodosius I ( ; 11 January 347 – 17 January 395), also known as Theodosius the Great, was Roman emperor from 379 to 395. He won two civil wars and was instrumental in establishing the Nicene Creed as the orthodox doctrine for Nicene C ...
and the army of Western Roman ruler Eugenius, in 394, albeit it had a peripheral role, as it was probably used only for the encampment of Eugenius's infantry. It was depicted in the 5th-century register . It was demolished by
Attila Attila ( or ; ), frequently called Attila the Hun, was the ruler of the Huns from 434 until his death in early 453. He was also the leader of an empire consisting of Huns, Ostrogoths, Alans, and Gepids, among others, in Central Europe, C ...
, the ruler of the Huns, in 451. The fortress in a form of an irregular
polygon In geometry, a polygon () is a plane figure made up of line segments connected to form a closed polygonal chain. The segments of a closed polygonal chain are called its '' edges'' or ''sides''. The points where two edges meet are the polygon ...
had a defensive wall (called in Slovene ) and fourteen defensive towers. Its width was c. , its length was c. , and its full perimeter was c. . The wall had a thickness of . The square towers had a height of at least . Seven towers and a part of the wall have been preserved. A
ditch A ditch is a small to moderate trench created to channel water. A ditch can be used for drainage, to drain water from low-lying areas, alongside roadways or fields, or to channel water from a more distant source for plant irrigation. Ditches ...
surrounded the fortress. Extensive archaeological research has been conducted at the site. In addition to the already known ruins, several urn and skeletal graves, smaller Roman baths with a
caldarium image:Caldarium.JPG, 230px, ''Caldarium'' from the Roman baths at Bath, Somerset, Bath, England. The floor has been removed to reveal the empty space where the hot air flowed through to heat the floor. A (also called a ''calidarium'', ''cella ca ...
, and, in September 2016, the eleventh defensive tower have been discovered.


References


External links

* {{Coord, 45, 53, 21.3, N, 13, 54, 18.9, E, display=title Military of ancient Rome Roman fortifications in Slovenia Ajdovščina