Christianization of Kievan Rus'

The conversion of Kievan Rus', the medieval state centred on Kyiv, to Byzantine Christianity unfolded over more than a century, with missions, royal baptisms and pagan reactions. Tradition fixes its decisive moment around 988, when Prince Vladimir was baptised at Chersonesus in Crimea and then had the people of Kyiv baptised in the Dnieper. Known as the baptism of Rus', the event tied the East Slavs to Byzantium and to the Orthodox church, and it remains central to the national histories of Ukraine, Russia and Belarus.

Christianity reached the northern Black Sea coast long before any Rus' state existed, through Greek colonies and later the Goths of Crimea. A later legend in the Primary Chronicle, the main early Rus' history, has the apostle Andrew travel up the Dnieper and bless the future site of Kyiv, but scholars regard this as a late addition meant to give the city an apostolic origin. The first recorded mission came after a Rus' attack on Constantinople in 860. In a letter of 867, Patriarch Photius claimed that the Rus' had embraced the faith so eagerly that he had sent them a bishop. A later Byzantine account credits Emperor Basil I with a second mission. Whatever their scope, these efforts left no lasting church.

By the 940s Kyiv had a sizeable Christian community, especially among the prince's retinue and merchants. A treaty with Byzantium from that time records Christian Rus' swearing by their faith while the prince and others swore by the gods Perun and Veles, and a church of St Elijah stood in the city. Princess Olga, ruling as regent, visited Constantinople in 945 or 957 and became a Christian, probably there, though the place of her baptism is not recorded. In 959 she also asked the western emperor for a bishop and priests, but the mission of Bishop Adalbert in 962 failed. Her son Sviatoslav remained a committed pagan, reportedly fearing his warriors' mockery, and churches in Kyiv were destroyed during his reign.

Vladimir seized power in Kyiv around 980, after his half-brother Yaropolk was killed on his orders, and at first set up a shrine to six Slavic gods near his residence. His conversion was bound up with Byzantine politics. In 987 the general Bardas Phokas rebelled against Emperor Basil II, who asked Vladimir for military help. Vladimir agreed in return for marriage to the emperor's sister Anna, on condition that he and his people would accept Christianity.

In the spring of 988 Rus' troops helped defeat Phokas. When Basil hesitated over the marriage, Vladimir took and sacked Chersonesus, a Byzantine city in Crimea, and the emperor gave way. Returning to Kyiv with his bride and with priests from Chersonesus, Vladimir had his sons and many nobles baptised and ordered the pagan idols destroyed; the statue of Perun was thrown into the Dnieper. According to the Primary Chronicle, he then summoned the whole population to the river, warning that those who stayed away would be counted as his enemies, and they were baptised in a mass ceremony. He built the Church of the Tithes, the first stone church in Rus'.

Conversion beyond Kyiv was slower and sometimes forced. Novgorod was baptised in 989 only after fierce fighting, and pagan uprisings flared there and in the Rostov region for decades; one in Novgorod as late as 1071 threatened the bishop's life. Pre-Christian burial customs and gods persisted in popular culture. Yet the new faith brought Byzantine learning, books and church architecture. Under Vladimir's son Yaroslav, Metropolitan Ilarion wrote the Sermon on Law and Grace, the earliest known work of East Slavic literature.

In 1988 the millennium of the baptism was celebrated across the Orthodox and Eastern Catholic world, and in the Soviet Union the celebrations marked a turning point, with many churches returned to the Russian Orthodox Church. In 2022 Ukraine made the traditional anniversary a public holiday, Statehood Day.

Our 900 and 1000 maps show Kievan Rus' north of the Black Sea, with the Byzantine Empire across the water to the south.