Christianity spread rapidly in the early centuries of the faith, primarily due to the missionary efforts of the apostles and other early followers of Jesus. The establishment of churches and the dissemination of the teachings of Christianity through written texts and oral traditions also contributed to its growth. Additionally, the conversion of rulers and the adoption of Christianity as the official religion of the Roman Empire by Emperor Constantine in the 4th century further facilitated the spread of the faith. The development of the Nicene Creed and other theological doctrines also helped to unify and solidify Christianity as a widely accepted religion.
