What is major religion in of Europe?

Christianity is the major religion in Europe. According to a 2015 Pew Research Center study, 74% of the European population identifies as Christian. The largest Christian denomination in Europe is Roman Catholicism, which accounts for 48% of the total Christian population. Protestantism is the second largest Christian denomination in Europe, accounting for 38% of the total Christian population. Eastern Orthodoxy is the third largest Christian denomination in Europe, accounting for 13% of the total Christian population.