Bishop Eusebius of Caesarea was a prominent early Christian historian and theologian, born around 260 AD in what is now modern-day Palestine. He is best known for his work, the "Ecclesiastical History," which chronicles the development of the Christian church from the time of Christ to his own era. Eusebius is often referred to as the "Father of Church History" for his detailed accounts and insights into early Christianity. Eusebius served as the bishop of Caesarea, a significant city in Palestine, during the reign of the Roman Emperor Constantine. His writings not only provide historical context but also reflect the theological debates of his time. Eusebius played a crucial role in the establishment of the Christian canon and contributed to the understanding of early church practices and beliefs.