A map of Christianity in Europe after the great schism of 1054 CE (Wikimedia commons) between Orthodox Christians in the East (Roman/Byzantine Empire and East Slavic principalities) and Catholic Christians in the West (Holy Frankish/Roman Empire, the other Frankish kingdoms and their satelite states). Five centuries later, a new schism took place between the Catholics of SW Europe and the Protestant Christians of NW Europe.
The following map is a political map of Europe around 1000 CE, just a few decades before the first Schism. The main state units, the Roman Empire and the Principalities of Kiev and Novgorod for the Orthodox, and the Holy Frankish/Roman Empire, France and Hungary for the Catholics are shown.

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