Catholicism and Protestanism were main and Anglicanism began as an 'interweaving' of these two. See related link below:
Western Europe is majority Catholic whiel Russia is majority Eastern Orthodox. Both are branches of Christianity, however.
Christianity
There are many different branches of Christianity, but the most common in Europe and other Western countries are Christianity, and Catholic. Some other smaller but still large branches include Mormon and Anglican.
Christianity
Christianity I believe
The areas of Europe that likely believed in Christianity was the western part of Europe, which is Spain and Italy.
Europe and the Western Hemisphere
Christianity
Christianity, Islam,and Judiasm.
europe and entire western hemisphere[:
The most widespread religion is Christianity.
Christianity