During the early Middle Ages, a massive cultural shift took place across Europe: the Christianisation of the Slavs. It was a complex game of diplomacy, power, and identity.Key historical milestones to know:

863: Cyril and Methodius invent a brand-new alphabet to translate the Bible into Old Church Slavonic.

864: Khan Boris I baptizes Bulgaria, strategically choosing the Orthodox path.

966: Mieszko I adopts Catholicism, anchoring Poland firmly to Western Europe.

988: Prince Vladimir the Great baptizes the Kievan Rus' in the waters of the Dnieper River.