Note (52), page 44.

This memorable transaction is fully described in the great History of Armenia by Chamchean, and in the work of Galanus, vol. i. p. 346 and following. Many letters of Leon and the Catholicos exist now only in the Latin translations (Quadro l. c. 99.), or better have not been heard of by the Mechitarists at Venice. Frederic I., to whom Leon was very useful in the time of the second crusade, promised the Baron of Cilicia to restore in his person the ancient kingdom of Armenia. After the unfortunate death of the emperor, Leon sent ambassadors to the Pope Celestinus III. and Henricus VI., to gratify his wishes; the ambassadors came back to Cilicia in the society of the archbishop Conrad of Mentz, bringing the crown from the emperor and the benediction of the pope. The Emperor of Constantinople, Alexius, sent also a crown to Leon “the Great.” The king of Cilicia is, as far as I know, the only king who received the crown by both the emperors of the west and the east, and by the consent of the pope. The pope hoped to bring the Armenians under his sway, and the Latins and the Greeks thought Leon a very useful ally against the overpowering Saladin.—See the Letters in the Appendix.