Given textual and archaeological evidence, it is thought that thousands of Europeans lived in Imperial China during the Yuan dynasty.[1] These were people from countries traditionally belonging to the lands of Christendom during the High to Late Middle Ages who visited, traded, performed Christian missionary work, or lived in China. This occurred primarily during the second half of the 13th century and the first half of the 14th century, coinciding with the rule of the Mongol Empire, which ruled over a large part of Eurasia and connected Europe with their Chinese dominion of the Yuan dynasty.[2] Whereas the Byzantine Empire centered in Greece and Anatolia maintained rare incidences of correspondence with the Tang, Song and Ming dynasties of China, the Holy See sent several missionaries and embassies to the early Mongol Empire as well as to Khanbaliq (modern Beijing), the capital of the Mongol-led Yuan dynasty of China. These contacts with the West were preceded by rare interactions between the Han dynasty and Hellenistic Greeks and Romans.
Mainly located in places such as the Yuan capital of Karakorum, European missionaries and merchants traveled around various parts of the Yuan dynasty and other Mongol-ruled khanates during a period of time referred to by historians as the "Pax Mongolica". Perhaps the most important political consequence of this movement of peoples and intensified trade was the Franco-Mongol alliance, although the latter never fully materialized, at least not in a consistent manner.[3] The establishment of the Ming dynasty in 1368 and reestablishment of ethnic Han rule led to the cessation of European merchants and Roman Catholic missionaries living in China. Direct contact with Europeans was not renewed until Portuguese explorers and Jesuit missionaries arrived on Ming China's southern shores in the 1510s, during the Age of Discovery.
The Italian merchant Marco Polo, preceded by his father and uncle Niccolò and Maffeo Polo, traveled to China during the Yuan dynasty. Marco Polo wrote a famous account of his travels there, as did the Franciscan friar Odoric of Pordenone and the merchant Francesco Balducci Pegolotti. The author John Mandeville also wrote about his travels to China, but he may have based these on preexisting accounts. In Khanbaliq, the Roman archdiocese was established by John of Montecorvino, who was later succeeded by Giovanni de Marignolli. Other Europeans such as André de Longjumeau managed to reach the eastern borderlands of China in their diplomatic travels to the Yuan imperial court, while others such as Giovanni da Pian del Carpine, Benedykt Polak, and William of Rubruck traveled instead to Outer Mongolia. The Turkic Chinese Nestorian Christian Rabban Bar Sauma was the first diplomat from China to reach the royal courts of Christendom in the West.