Mongol Empire What is referred to in English as the Mongol Empire was called the "Ikh Mongol Uls" ("ikh": "great", "uls": "state"; Great Mongolian State). In the 1240s, one of Genghis's descendants, Güyük Khan, wrote a letter to Pope Innocent IV which used the preamble "Dalai (great/oceanic) Khagan of the great Mongolian state (ulus)". After the succession war between Kublai Khan and his brother Ariq Böke, Ariq limited Kublai's power to the eastern part of the empire. Kublai officially issued an imperial edict on 18 December 1271 to name the country Great Yuan ("Dai Yuan", or "Dai Ön Ulus") to establish the
Religion in the Mongol Empire interests of the next life. Thus he invited Sakya Pandita to his ordo. Prince Kötön was impressed and healed by Sakya Pandita's teachings and knowledge, and later became the first known Buddhist prince of the Mongol Empire. Kublai Khan, the founder of Yuan dynasty, also favored Buddhism. As early as the 1240s, he made contacts with a Chan Buddhist monk Haiyun, who became his Buddhist adviser. Kublai's second son, whom he later officially designated as his successor in the Yuan dynasty, was given a Chinese name "Zhenjin" (literally, "True Gold") by Haiyan. Khatun Chibi influenced Kublai to be converted to