Eusebius of Caesarea (c. AD 263 – 339) also called Eusebius Pamphili, was a Roman historian, exegete and Christian polemicist. He became the Bishop of Caesarea in Palestine about the year 314. Together with Pamphilus, he was a scholar of the Biblical canon. He wrote Demonstrations of the Gospel, Preparations for the Gospel, and On Discrepancies between the Gospels, studies of the Biblical text. As "Father of Church History" he produced the Ecclesiastical History, On the Life of Pamphilus, the Chronicle and On the Martyrs.

Little is known about the life of Eusebius. His successor at the see of Caesarea, Acacius, wrote a Life of Eusebius, but this work has been lost. Eusebius' own surviving works probably only represent a small portion of his total output. Since he was on the losing side of the long 4th-century contest between the allies and enemies of Arianism (Eusebius was an early and vocal supporter of Arius), posterity did not have much respect for Eusebius' person and was neglectful in the preservation of his writings. Beyond notices in his extant writings, the major sources are the 5th-century ecclesiastical historians Socrates, Sozomen, and Theodoret, and the 4th-century Christian author Jerome. There are assorted notices of his activities in the writings of his contemporaries Athanasius, Arius, Eusebius of Nicomedia, and Alexander of Alexandria. Eusebius' pupil, Eusebius of Emesa, provides some incidental information.

Caesarea (Hebrew: קֵיסָרְיָה‎‎; Arabic: قيسارية‎, Kaysaria; Greek: Καισάρεια) is a town in Israel located mid-way between Tel Aviv and Haifa (45 km), on the Israeli coastal plain near the city of Hadera. Modern Caesarea as of December 2007 has a population of 4,500 people. It is the only Israeli locality managed by a private organization, the Caesarea Development Corporation, and also one of the most populous localities not recognized as a local council. It lies under the jurisdiction of the Hof HaCarmel Regional Council.

The town was built by Herod the Great about 25-13 BCE as the port city Caesarea Maritima. It served as an administrative center of Judaea Province of the Roman Empire, and later the capital of the Byzantine Palaestina Prima province during the classic period. Following the Arab conquest in the 7th century, the city fell into obscurity until Crusader renovation, but was again abandoned after the Mamluk conquest. It was populated in 1884 by Muslim Bosnyak immigrants, making it a small fishing village. In 1940, kibbutz Sdot Yam was established on Jewish lands next to the Bosnyak village. During the Civil War in Mandatory Palestine, the town was abandoned by the Bosnyak residents, and in 1952 a Jewish town of Caesarea established near the ruins of the old city, which were made into the national park of Caesarea Maritima.