A Roman Synod convoked by Charlemagne met on December ist of the year 800 for the purpose of investigating the accusations levelled against Pope Leo III. In the presence of the pope, the Frankish king presided over an assembly composed of ecclesiastics, Frankish and Roman nobles, including members of the Frankish episcopate — to wit, Arno of Salzburg, Theodulph of Orléans, Riculf of Mayence, Aaron of Angorra, the Saxons Witto and Fredugis, Alcuin's confidants — and other persons of consequence. The eldest son of Charlemagne, Charles, who together with his sisters had accompanied his father to Rome, was another participant.