Christianity, a monotheistic religion founded on Jesus Christ's teachings, emerged in the 1st century CE. It spread rapidly throughout the Roman Empire, eventually becoming the world's largest religion. Christianity's core beliefs center on the Trinity, salvation through faith in Jesus, and the Bible as sacred text. Christianity has three main branches: Catholic, Orthodox, and Protestant. Each branch has distinct practices and interpretations of Christian doctrine. Despite differences, all Christians share belief in Jesus as the Son of God and savior of humanity. Christianity's impact on society, culture, and global history has been profound and far-reaching.