Perhaps the most important aspect of European life and culture, religion, especially Christianity, was largely affected by the unification of the Byzantine and Frankish Empires in 802 AD. Eastern Europe and Western Europe had grown apart from each other following the fall of the Western Roman Empire in 476 AD. In our timeline, these religious differences led to a schism that resulted in the creation of two distinct churches: the Roman Catholic Church and the Eastern Orthodox Church. In this timeline, however, the schism never occurs. Therefore, there is no need to distinguish the sects of Christianity that were created in the schism, such as Catholicism.
Europe is more unified against foreign religions, especially those of Norse and Islamic roots. While some splits do occur in Christianity (especially during the 17th and 18th centuries), the Carolingian Empire remains predominately under the banner of the Christian Church.
5 Major Religions