Question

Where did Christianity spread to?

Answer 1

Briefly: Christianity began in 1st-century Judea (Roman province) and then spread throughout the Roman Empire and, over many centuries, into Europe, North Africa, the Caucasus and Ethiopia, and — from the 15th century onward — across the Americas, sub‑Saharan Africa, Asia and the Pacific through exploration, colonization and missionary activity. Today it is a global religion with large communities on every continent.

More detail, by period and region

- Origins (1st century): Jerusalem and surrounding parts of Judea; spread quickly to nearby cities such as Antioch and to Jewish and Gentile communities across the eastern Mediterranean.

- Roman Empire (1st–4th centuries): Asia Minor (modern Turkey), Greece, Macedonia, Italy (including Rome), and North Africa (Carthage, Alexandria). By the 4th century Christianity became the Roman Empire’s dominant religion after Constantine and state endorsement.

- Caucasus and northeastern Africa (4th–6th centuries): Armenia (often cited as the first state to adopt Christianity as a national religion), Georgia, and the Kingdom of Aksum (Ethiopia and Eritrea).

- Byzantine and Slavic expansion (6th–11th centuries): Christianity spread from Byzantium into the Balkans and to the Slavic peoples (Russia, Ukraine, Bulgaria, Serbia) largely through Byzantine missionaries (e.g., Cyril and Methodius).

- Northern and Western Europe (5th–11th centuries): Ireland, Britain, Frankish lands, Scandinavia and much of Western Europe were Christianized by missionaries, monastic movements and medieval kingdoms.

- Later medieval expansion (11th–15th centuries): Continued spreading within Europe and into border regions; the Crusades and trade also played roles.

- Global era (15th century onward): With European exploration and colonialism, Christianity established large presences in the Americas, Oceania, parts of Africa and parts of Asia (the Philippines, parts of India, and later efforts in China, Japan and Southeast Asia). Missionary movements in the 18th–20th centuries expanded conversion and church establishment in sub‑Saharan Africa, East and Southeast Asia, and the Pacific.

Present distribution: Christianity is worldwide. Major concentrations are in the Americas, Europe, sub‑Saharan Africa and parts of Oceania; large communities also exist in the Philippines, South Korea, India and other Asian countries. Major branches include Roman Catholicism, Eastern Orthodoxy, Oriental Orthodoxy, and Protestantism (including Anglicanism, Lutheranism, Reformed, Baptist, Pentecostal and others).

If you want, I can make a timeline, map the spread region-by-region, or summarize how particular denominations spread. Which would you prefer?