Main Limes

In order to secure the riverbank, it was sufficient to erect free-standing towers backed up by the forts of the units stationed nearby; there was never a continuous barrier of palisades and ditches here.

[2] On the other bank of the Main was the largely uninhabited Spessart, a wooded hill range which, like the Odenwald which borders it to the south-west, was particularly interesting for the Romans, especially because of its timber.

In inscriptions, there are reports of the logging vexillationes of the 22nd Legion, which were stationed in Obernburg, Stockstadt and Trennfurt.

[3] In the majority of forts, settlement activity continued after the fall of the limes, which is why, as in Obernburg Niedernberg, Seligenstadt and Großkrotzenburg, they are now located below the medieval village centres.

At the crossing of the Main at Großkrotzenburg a Roman bridge has been identified from post sockets (Pfahlschuhe).