Mons Brisiacus

MONS BRISIACUS This is one of the positions in the Roman Itins. along the Rhine. They place it between Helvetum or Helcebus [HKLCEBUS] and Urunci. There is no doubt that is Vieux-Brisach or Altbreisach, as the Germans call it. All the positions of the Itins. on the Rhine are on the west or Gallic side of the river, but Vieux-Brisach is on the east side. The Rhine has changed its bed in several parts, and this is one of the places where there has been a change. Breisach is described by Luitprand of Pavia (quoted by D'Anville), as being in the tenth century surrounded by the Rhine in modum insulae.I t may have been on an island in the Roman period. The hill (mons) of Altbreisach is a well marked position, and was once crowned by a citadel. Altbreisach is now in the duchy of Baden, and opposite to Neubreisach on the French side of the Rhine.