The hill, on which Breisach came into existence was — at least when there was a flood — in the middle of the Rhine, until the Rhine was straightened by the engineer Johann Gottfried Tulla in the 19th century, thus breaking its surge.
Kullen som Breisach kom till stånd var - åtminstone när det fanns en flod - mitt i Rhen fram till Rhen rätades av ingenjören Johann Gottfried Tulla i 1800-talet, således bryta sitt uppsving.