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
The Byzantines spread Orthodox Christianity to those areas.
As the largest religion in the world with its 2.1 billion adherents, Christianity is prevalent in Europe, the America's, and Africa.
The Byzantines spread Orthodox Christianity to those areas.
Throughout the world with its over 2.1 billion adherents. Major areas for Christianity were Europe and the English-speaking nations, however, these are in decline - particularly in Europe - while the Spanish nations of South America and the African nations are growing quite quickly.
By AD 400, Christian areas were mainly concentrated in Europe, Asia, and Africa. Christianity had spread throughout the Roman Empire in Europe, reached the eastern regions of Asia, and had significant communities in North Africa as well.
Christianity is a worldwide religion with over 2.1 billion adherents. They are well established in Western Europe, North and South America. They are growing quickly in Africa. It is predominant in Australia, New Zealand, and Russia.
It was within 10 years after the 1st Pentecost in June, 31 AD that the Apostles began speading the Word of God throughout the adjacent areas - which included Greece and Rome. It really began to spread throughout Europe after Constantine of Roman accepted Christianity as a religion of the Empire.
Christianity
Paul the apostle visited various areas of Mediterranean Europe including Greece, Italy, and possibly Spain. Some of the cities he visited are Athens, Corinth, Ephesus, and Rome, where he spread the teachings of Christianity.
A lot of Christianity is based in the areas of Israel/Palestine, though mainly Israel.
Rome practiced Christianity in 600 CE