 In the seventh century the area was part of the Slavic principality of Carantania, which fell under the suzerainty of Duke Odilo of Bavaria in about 743.The Bavarian stem duchy was incorporated into the Carolingian Empire when Charlemagne deposed Odilo's son Duke Tassilo III in 788.In the 843 partition by the Treaty of Verdun, Carinthia became part of East Francia under King Louis the German.