In 828, Carantania becomes a margraviate of the Frankish empire.

The local princes are deposed for following the anti-Frankish rebellion of Ljudevit Posavski and replaced by a Germanic (primarily Bavarian) ascendancy.

In 843, it passes into the hands of Louis the German (804-876).

In 887, Arnulf of Carinthia (850-899), a bastard grandson of Louis the German, assumes his title of King of the East Franks and becomes the first Duke of Carinthia.