Early Church figures were influential leaders and theologians in the formative years of Christianity, particularly from the 1st to the 4th centuries. They played crucial roles in spreading the teachings of Jesus Christ and establishing foundational doctrines. Notable figures include Saint Peter, one of Jesus' apostles, and Saint Paul, who traveled extensively to spread the Gospel and wrote many letters that became part of the New Testament. These leaders also faced challenges, such as persecution and theological disputes. They contributed to the development of early Christian communities and helped define key beliefs, such as the nature of the Trinity and the importance of the sacraments. Their writings and teachings continue to influence Christianity today.