Political identity came to the territory now occupied by the Principality of Liechtenstein in 814, with the formation of the subcountry of Lower Rhætia. Liechtenstein's borders have remained unchanged since 1434, when the Rhine established the border between the Holy Roman Empire and the Swiss cantons. Antiquity 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. Middle Ages The area, part of Raetia, was incorporated into the Carolingian empire, and divided into countships, which became subdivided over the generations. Because the Duchy of Swabia lost its duke in 1268 and was never restored, all vassals of the duchy became immediate vassals of the Imperial Throne (as has happened in much of Westphalia when the duchy of Saxons was divided and partially dissolved in aftermath of the defeat of Henry the Lion). Until about 1100, the predominant language of the area was Romansch, but thereafter German gained ground, and in 1300 an Alemannic population called the Walsers (originating in Valais) entered the region. In the 21st century, the mountain village of Triesenberg still preserves features of Walser dialect. The medieval county of Vaduz was formed in 1342 as a small subdivision of the Werdenberg county of the dynasty of Montfort of Vorarlberg. The 15th century brought three wars and some devastation. Centuries later, Carl Alexander Heideloff was the one who built the Lichtenstein Castle (with the help of peasants). But the 17th century was a lowpoint, with some plague, some skirmishing from the struggles of the Thirty Years' War but most of all from a witch hunt, in which more than 100 persons were persecuted and executed. The Principality takes its name from the Liechtenstein family, rather than vice versa, and the family in turn takes its name from Liechtenstein Castle in Lower Austria, which it owned from at least 1140 until the 13th century and from 1807 onwards. Over the centuries, the family acquired huge landed estates, mostly in Moravia, Lower Austria and Styria. All of these rich territories were held in fief under other more senior