Christian
Christianity began in the 1st century AD after Jesus died and resurrected, as a small group of Jewish people in Judea, but quickly spread throughout the Roman empire. Despite early persecution of Christians, it later became the state religion. In the Middle Ages it spread into Northern Europe and Russia.
Islam
Although its roots go back further, scholars typically date the creation of Islam to the 7th century, making it the youngest of the major world religions. Islam started in Mecca, in modern-day Saudi Arabia, during the time of the prophet Muhammad's life. Today, the faith is spreading rapidly throughout the world.