Christian history traces the development of the Christian faith from its origins in the 1st century CE, following the life and teachings of Jesus Christ. Early followers, known as apostles, spread the message throughout the Roman Empire, leading to the establishment of various communities and the writing of the New Testament. Over the centuries, Christianity evolved into different branches, including Catholicism, Orthodoxy, and Protestantism. Key events, such as the Council of Nicaea in 325 CE and the Reformation in the 16th century, shaped its beliefs and practices, influencing cultures and societies worldwide.