Tassilo III was the final ruler of the Agilolfing dynasty, serving as the duke of Bavaria from 748 until his deposition in 788. Born to Duke Odilo and Hitrud, the daughter of Charles Martel, he governed his territory under Frankish suzerainty. Although he exercised significant authority and maintained strong ties with the Lombards and the papacy, his independence eventually led to a confrontation with Charlemagne. Following his removal from power, he was forced to renounce his family's claims to the duchy and lived out his remaining years in monastic exile.