making Chur one of the oldest settlements in Switzerland. In ancient times, the area of what is today Ticino was settled by the Lepontii, a Celtic tribe. Later, probably around the reign of Augustus, it became part of the Roman Empire. In ancient times, the region had long been inhabited by the Celts before it became part of the ancient Roman provinces of Raetia and Noricum. There were two Celtic tribes settled in the future Vorarlberg area: the Raeti in the highlands, and the Vindelici in the lowlands, i.e. the Lake Constance region and the Rhine Valley prior to the Romans conquered Vorarlberg area. Rome conquered the area of the future Municipality of Schellenberg in 15BCE. Classical antiquity Most of the lands of the region were once part of a Roman province called Raetia, which was established in 15BCE. The current capital of Graubünden, Chur, was known as Curia in Roman times. The area was later part of the diocese of Chur. A Roman road crossed Liechtenstein 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, for long uninhabited because of periodic flooding. Some Roman villas have been excavated in Schaanwald and Nendeln. Nearly 2,000 years later, some of the population of Graubünden still speak Romansh which has descended from Vulgar Latin. By 259, Alamanni tribes had overrun the Limes and caused widespread devastation of Roman cities and settlements in the Crisis of the Third Century. The Roman Empire succeeded in re-establishing the Rhine as the border, but it was now a frontier province. The late Roman influx from the north by the Alemanni also influenced the makeup of the Principality of Liechtenstein and is also evidenced by the remains of a Roman fort at Schaan. Roman villas have been excavated in Schaanwald and Nendeln. The area that Innsbruck is located in was probably inhabited in the early Stone Age. Several surviving pre-Roman place names exist in and about the city. In the 4th century Chur also became the seat of the first Christian bishopric north to the Alps. Despite a legend assigning its foundation to a legendary British king, St Lucius, the first known bishop is one Asinio in AD 451. Early history In the 6th century the Slavs settled the area, and the local dioceses collapsed. This is shown in archaeological culture.