Question

When did Christianity become the dominant religion in Eruope

Answer 1

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 Baltic Christianization in the 15th century.

Answer 2

The year of 380 A.D

Step-by-step explanation:

The Eastern Roman Empire offically adopted Christianity around the year of 380 A.D, after this, Christianity spread rapidly and in the 15th century, all of Europe became Christanized after the Baltic conversion.