What is the largest religion in the Middle Ages?

Answer 1

Christianity was the dominant religion in Europe during the middle ages, but was certainly not the only religion practiced in Europe, nor was Christianity a homogeneous body during the period. Christianity divided into the Western and Eastern Churches in the schism of 1054. There were also Muslims, Jews, and Pagans in Europe during the middle ages. Muslims had conquered the Iberian peninsula during the early 8th century and were not fully expelled by Christians until the end of the 15th century. Parts of Northern and Eastern Europe remained pagan until the 13th century. There were Jewish populations at various locations all throughout the middle ages as well, although they were always minority groups living within other societies.