Domitian of Carantania was a Slavic nobleman living in the principality of Carantania during the era of Charlemagne. He is remembered as a ruler who transitioned his people from paganism to Christianity. According to tradition, he founded the church at Millstatt Abbey following the tragic death of his son. While some historians once questioned his existence, archaeological findings of an epitaph mentioning his name and the era of Emperor Charlemagne suggest he was a real historical figure who served as a local leader under Frankish rule.