Danubian Limes

The Danubian Limes (German: Donaulimes), or Danube Limes, refers to that part of the Roman military frontier or Limes which lies along the River Danube in the present-day German state of Bavaria, in Austria, Slovakia, Hungary, Serbia, Bulgaria and Romania.

Unlike the Neckar-Odenwald Limes in Germany the border ramparts were reinforced with numerous watchtowers, legion camps (castra) and forts (castella), due to the boggy and dendritic nature of the river banks. The camps were built in the mid-1st century. Later, under Trajan, the camps, which had originally only been surrounded by earthen embankments, were also enclosed by stone walls.

A Roman road, the Danube Way (Lat.: Via Istrum) was laid along the Limes, which linked the stations, camps and forts as far as the Danube delta.

Because of the sheer length of this border, the Danubian Limes is often divided into the following subdivisions:

The Upper Germanic-Rhaetian Limes between the Rhine and the Danube

The Noric-Pannonian Limes in present-day Austria

The Pannonian Limes in present-day Hungary

The Moesian Limes in present-day Bulgaria and Romania

The oldest Roman camp in Austria was Carnuntum. Fourteen kilometres away to the west an auxiliary fort (Hilfskastelle) was built near Schlögen (today in the municipality of Haibach ob der Donau) in Upper Austria. At that time, the limes ran from Vienna to Linz roughly following the present-day Wiener Straße (B 1).

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