 The borders of the later Carantania state, which was under the feudal overlordship of the Carolingians, and its successor (the March of Carinthia, 826–976), as well as of the later Duchy of Carinthia (from 976), extended beyond historical Carantania.In the 4th century Chur became the seat of the first Christian bishopric north to the Alps.Despite a legend assigning its foundation to an alleged Briton king, St. Lucius, the first known bishop is one Asinio in AD 451.