Chapter Eighty Four.
Time has come to speak about European Christianity as of early 11th century. Now, ofcourse, there were the Nestorians in Central Asia, the Coptics in Egypt, the Orthodox in Byzantine Empire, etc, etc, but I don't think I explained the Christianity in Western and Central Europe.
The fall of Charles Martel's empire, and the Saxon-Avar invasions, and finally the great Magyar invasion - all this shook up the Catholic Church badly. In fact, apart from religious enclaves, only Lombardy and Venice remained Catholic. Catholicism by then was very entwined with the Sacred Roman Emperor, and Lombard king, the Pope being his de facto chief advisor. It indeed became increasingly a political tool, but a tool that occasionally was using its owner.
In the Magyar states, Christianity was seriously weakened, and though there were some Catholics remaining in Itala and some Orthodox remaining in Magyaray, generally the Christians there, up to circa 1010, were disorganized and individualized ("village sects" were common due to this). At about 1010, Charles Tareling, a great theologist and a future Gaelic saint, managed to organize a "Gaelic Christian Church" in Francia. The Gaelic Church was rather similar to the Aryan one, but also adopted some Magyar and many old Frankish cultural elements. Gaelic churches would eventually gain the favor of the Francian ruler, Tamarlyn II, and some of them would appear in Itala and west Hermaland.
Brittany too experienced a Church renaissance, but despite Gaelic church spreading there as well, the dominant Christian sect there was the "Celtic" (sometimes "Irish") Christianity, known both for its ascetism and for its written tradition. It was brought there by refugees from Ireland and Wales.
Celtic Church was also widespread in parts of Britain, but also there, amongst the Viking Christians (a minority, but a growing one), a bastardized version of Christianity came to be. Indeed, Christian legendary characters often even received Scandinavian names (Jesus, for example, became Gicur). This religion mixed pagan Scandinavian beliefs heavily with Christian ones, and also lacked a strong structure, and thus had a multitude of mini-sects, often one such sect for an entire clan.