Clement VII appointed Dardel Bishop of Tortiboli in the Kingdom of Naples, 11 April, 1383, as a reward for his labours on behalf of the Armenian king. He has left us an important "Chronique d'Arménie", hitherto unknown to Orientalists. It was discovered by Canon Ulysse Robert, who came across the manuscript in the Library of Dôle in France, and it has recently been published by the Institut des belles lettres of France in the second tome of the "Recueil des Historiens des Croisades".
Original text in Recueil des Historiens des Croisades: Documents Arméniens (Paris, 1906), II, 274-1038; Armenian version by G. ERGEANTZ, Jowhannu Dardeli Zhamanakagruthiun Hajoz (St. Petersburg, 1891); ROBERT, La Chronique d'Arménie de Jean Dardel, evêque de Tortoboli in Archives de l'Orient Latin (1884), II, 1-15; TEZA, Leone VI e frate Giovanni in Atti del R. Instituto Veneto di scienze, LXVI, ser. VIII, vol. IX, pt. II, 322-328; MAYER in Romania (July, 1907), 450-455.