○○○ 0989 ⪢⪢
After his baptism and wedding, Christianity of the Byzantine Rite becomes the official
religion of the Kievan Rus', under the authority of the Patriarch of Constantinople.
http://qindex.info/i.php?x=11856
○○○ 1200 ⪢⪢
In Western Europe, the Catholic
religion is more and more on the offensive. The Pope launches the Baltic crusades intended to convert the pagan peoples around the Baltic sea. Germans arrive in Riga and begin their conquest.
http://qindex.info/i.php?x=17647