A Roman road crossed the region from south to north, traversing the Alps by the Splügen Pass and, following the right bank of the Rhine at the edge of the floodplain, was uninhabited for long lengths of time because of periodic flooding. Roman villas have been excavated in Schaanwald and Nendeln. The late Roman influx of the Alemanni from the north is memorialized by the remains of a Roman fort at Schaan.