متى دخلت  المسيحية أوروبا؟
The Roman Empire officially adopted Christianity in AD 380. During the Early Middle Ages, most of Europe underwent Christianization, a process essentially complete with the Christianization of Scandinavia in the High Middle Ages. The notion of "Europe" and the "Western World" has been intimately connected with the concept of "Christianity and Christendom"; many even attribute Christianity for being the link that created a unified European identity, especially since Christianity in the Middle East was marginalized by the rise of Islam from the 8th century, a constellation that led to the Crusades, which although unsuccessful militarily were an important step in the emergence of a religious identity of Europe. At all times, traditions of folk religion existed largely independent from official denomination or dogmatic theology.
During the Early Middle Ages