NESTORIAN CROSSES
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battle of Lignitz (1241) the knights of Europe were mown down, Europe lay helpless before the invaders, when the Great Khan Ogotai suddenly died, and the Mongol princes hastened back to be present at the grand assembly in Mongolia for the election of a successor. Europe was saved. But meantime through travelling merchants and friars contacts with the Mongols had been established in the Near East and, no doubt as a result of the Nestorian missions, and the conversion of the king of the Keraits in 1007, rumours grew of the rise of a great Christian Potentate in Central Asia called Prester John". Availing himself of the respite afforded by the withdrawal of the Mongols, the Pope conceived the idea of sending emissaries to the Mongol rulers, on the one hand to avert the threatened Mongol invasion by appealing to the reports of their common faith, and on the other to enlist their aid against the Moslem Turks in the Holy Land.
The emissary chosen by the Pope was Friar John of Pian de Carpine (Plano Carpini) who was despatched with a letter to the Mongol rulers in A.D. 1245. Proceeding with his companion Friar Benedict the Pole through South Russia and Central Asia, he arrived at the camp of Kuyuk Khan in northern Mongolia at the time of his election by the great assembly, and was received in audience by him. Friar John returned to Europe in 1247, and met King Louis IX of France in Paris preparing for the Fifth Crusade (1248-1254). He has left a short but valuable account of his journey and a history of the Mongol tribes.11
During the disastrous Fifth Crusade King Louis was accompanied by Friar William of Rubruck, and he received several travellers returning from the nearer Mongols and despatched several emissaries, the most important of whom was Friar William of Rubruck himself whom he sent in 1253 on a personal mission to the Great Khan. Friar William travelled from Constantinople via South Russia and Central Asia to Karakoram near the present Urga, as Friar John had done, and returned through Asia Minor. He has left a long and detailed account of his journey, which for accurate observation, and balanced judgment is a document
14 Rockhill, The Journey of William Rubruck with two accounts of ... John of Pian de Carpini, Hakluyt Society, Second Series, No. IV, 1900, D'Avezac: Relation des Mongols ou Tartares par le frère Jean du Plan de Carpin, Paris, 1938.