In the summer of 1288, outside the city of Bordeaux in Gascony, a small group of travellers approached the city walls. The inhabitants of the city gathered, curious to meet this collection of strange looking clergymen who were clearly far from home. The strangers told them that they had come from ‘over the eastern sea’ with letters and gifts from the ‘Mongol kings’ and the Patriarch in the east. Such strange reports, from visitors emerging from the unseen world over the horizon, a world known only from fantastical stories, deserved the immediate attention of the king.  

Edward I, the Duke of Gascony and King of England had been resident in Bordeaux for the last two years, overseeing the affairs of his duchy. Assembling his court, he welcomed these visitors from the east. The leader of the travellers was a monk named Rabban Sawma. He was a Uyghur Turk from China. He presented to Edward letters and gifts from the Mongol ruler of Persia, the ilkhan, Arghun, a great-great-grandson of Genghis Khan, and from the patriarch, Mar Yahbalaha, the head of the Church of the East. 

As a young lord, Edward had taken the crusader’s oath to go and fight to attempt to regain Jerusalem for Latin Christendom from the rule of unbelievers. Jerusalem had fallen from crusader control in 1244 after the city had been sacked by a large force of Kipchak warriors, nomads from the Central Asian steppes who had been displaced by the expanding Mongol empire. Arriving in 1271, Lord Edward managed to break the siege of the port-city of Acre, one of the last cities held by the King of Jerusalem. Over the next two years, however, his small force accomplished little, mostly skirmishing with herdsmen and burning houses and crops. His time in Acre came ignominiously to an end when he was stabbed with a poisoned dagger by one of his Muslim courtiers leading to lengthy and painful surgery. He left the dream of reaching Jerusalem behind him. Returning from crusade, Lord Edward was greeted with the news of his father Henry III’s death, heralding the start of his own reign. It wasn’t until 1274 that he finally reached England for his coronation. There in Westminster Abbey, he was invested with the splendour of Christian kingship. He swore on the gospel books to uphold and dispense justice and, having been anointed, he was dressed by the bishops in priestly robes and given a sword for the defence of the weak and ‘constraining those who do wrong to the Church’. Now, here in Bordeaux, these new visitors represented something quite outside his experience.  

Edward would have been familiar with the stories of Prester John. Reports of a grand and mysterious figure, a Christian ruler somewhere in the east who was both a priest and king, had begun circulating in the mid-twelfth century and were still current in European imaginations, especially as they tried to make sense of the new world that was opening up to them through contact with the Mongols. While there was not really any great Christian king in the Mongol empire, this legend does reflect the (correct) sense of medieval Europeans that a whole world of Christianity was going on beyond their horizon. 

Many historians today believe that until perhaps as late as the fourteenth century there were more Christians outside than inside Europe. Yet, in our books of global church history these believers rarely get more than a slim chapter, unrepresentative of their large share of the historical Christian demographic and experience. Throughout Late Antiquity and the Middle Ages there were significant numbers of Christians across Asia and Africa, in Ethiopia, Sudan and Egypt; Syria, Mesopotamia and Persia; India, Central Asia and China. Christians had been present in China as early as the sixth century, with significant numbers elsewhere much earlier. Meanwhile Egypt and many other areas of the Middle East had predominantly Christian populations until at least the twelfth to fourteenth centuries, which continued to makeup significant minorities into the twentieth century. In the Middle Ages these areas were global centres of population and development. Bordeaux was one of the largest cities in Europe at the time with a population of nearly 30,000 but cities like Alexandria, Baghdad, Merv (in present-day Turkmenistan) and Samarqand (in present-day Uzbekistan) were among the biggest in the world with populations in the hundreds of thousands, far larger than any in Europe. Present in the historical record of all these urban centres were Christian communities. We find them scattered across the textual record, although for many of these regions this record is far patchier than for medieval Europe, but when we dig (literally, archaeologically), we consistently find the evidence of Christian communities that no text ever told us about.  

By far the largest group of Christians outside Europe was the Church of the East. This church, once termed, inaccurately, Nestorian, was entirely distinct from the Eastern Orthodox churches but had rather grown out of those early churches that had been founded to the east of Judea, outside of the Roman empire in Persian ruled Mesopotamia. They soon rapidly grew to include communities across Asia, from Syria to China, and India to Mongolia. Syriac, a dialect of Aramaic, was the primary language of worship, prayer, and literature in these communities but the gospels, psalms and hymns were often translated into local vernaculars. Growing up outside the Constantinian revolution, which had seen the ushering in of the conception of Christian kingship with the Roman Emperor Constantine’s conversion to Christianity, and never succeeding in converting the Persian Shah or any other significant rulers, these eastern Christians had no experience of existing in a Christian state. Throughout the Church of the East, Christians always lived in pluralistic societies. The patriarch, the head of the church, was indeed for most of the Middle Ages based in Baghdad, also the seat of the Muslim Caliph, from where he oversaw the affairs of more communities than the Pope in Rome. 

By the time that Rabban Sawma made his journey to Europe, there were Christians throughout the Mongol empire (the largest empire until then ever seen). These included many Mongol queens, Khatuns, such as Sorqaqtani Beki, the mother of Kublai Khan, as well as many ordinary Mongols. Christianity had been present in Mongolia for at least a century by the rise of Genghis Khan in the early-thirteenth century and was very popular among many of the tribes he subordinated.  

Christianity for well over the first two thirds of its existence then was not a majority European faith and today it is again not majority western. Most Christians throughout history have lived outside Europe and North America, in pluralistic societies, ruled over by and living alongside non-Christians. The western experience is not just unrepresentative of Christianity today but unrepresentative of Christianity in the past. Christendom has been only a small part of the Christian experience.