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.” It 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.
[
G.L]