Aïbeg and Serkis
Aïbeg ("Moon Prince") is thought to have been a Turcophone Christian, possibly Uighur, and Sergis (from the Roman and later Christian name "Sergius" or "Sarkis") a Nestorian Christian, probably Assyrian. Both were sent by Baichu, to accompany the 1245 embassy of the Dominican Ascelin of Lombardia back to Lyon, France, where the Pope was residing at the time. They stayed there for about a year.
Aïbeg and Serkis met with Innocent IV in 1248, and remitted to him a rather vexing letter from Baichu, expressing his difficulty in understanding the Pope's message, and asking for his submission:
"By the strength of the Khagan, the word of Prince Baichu. You Pope, know that your messengers came to visit us and brought to us your letters. They made strange discourses to us, and we do not known if you ordered them to utter these words, and if they did so of their own accord..."— Letter from Baichu to Pope Innocent IV, 1248
As a reply to the letter from Baiju, Innocent IV remitted to the envoys the letter known as Viam agnoscere veritatis. According to historian Kenneth Setton, it "stated that Innocent IV had acted out of a sense of duty to let the true religion be known to the Mongols, and that he regretted the Mongols' perseverance in their errors and adjured them to cease their menaces." The Pope appealed to the Mongols to stop their killing of Christians, while indicating no further interest in continuing the dialogue.
- Roux, p.316: "Ascelin of Cremone (...) had himself accompanied by two diplomats, a Christian turcophone, maybe Uighur, named Aibeg ("Moon Prince"), and a Nestorian, probably Syrian, Sergis".
- Runciman, p.259.
- Roux, p.316.
- Quoted in Roux, p.316.
- Roux, Histoire de l'Empire Mongol, p.316: "Sergis et Aibeg were finally sent back on November 22, 1248, with an answer, known as Viam agnoscere veritatis" (Original French quote: "Serbeg et Aibeg furent finalement congédiés le 22 Novembre 1248 avec une réponse, la lettre connue comme Viam agnoscere veritatis").
- Setton, p.522 "The Pope's reply to Baidju's letter, Viam agnoscere veritatis, dated November 22, 1248, and probably carried back by Aibeg and Sargis".
- Setton, p.522 .
- Rachewiltz, p. 118. "In his letter the pontiff urged the Mongols to stop persevering in their errors and to end the slaughter, especially of Christians. There is not even a hint at a renewal of the dialogue with the Tartars."
- Roux, Histoire de l'Empire Mongol, p.316.
- Jackson, Peter, Mongols and the West, p. 89
- Grousset, Rene, Histoire des Croisades, III, Tempus, 2006 edition, ISBN 2-262-02569-X
- Rachewiltz, I, Papal Envoys to the Great Khans, Stanford University Press, 1971.
- Roux, Jean-Paul, Histoire de l'Empire Mongol, 1993, Fayard, ISBN 2-213-03164-9
- Kenneth Meyer Setton, "A History of the Crusades"
- Runciman, Steven, History of the Crusades, III, Penguin Books, 2002 edition, ISBN 0-14-013705-X