Christianity

On 14 April 966, Mieszko I, pagan ruler of the Polans, converted to Christianity following his marriage to Doubravka of Bohemia. The baptism created Poland. What followed would be centuries of glory, tragedy, erasure, and resurrection.

On 27 February 380, Theodosius I issued the Edict of Thessalonica and made Nicene Christianity the only legal religion of the Roman Empire. Christianity had joined a very exclusive club.