Infobox saint
| honorific_prefix= Saint
| name = Eusebius of Caesarea
| image = St. Eusebius T'oros Roslin Gospels.png
| caption = Icon portrait of the church historian Eusebius of Caesarea as a saint from T'oros Roslin Gospel manuscript in Armenia dated 1262
| titles = The Father of Church History
| venerated_in = Syriac Orthodox Church"The Church Historian and Metropolitan of Caesarea for twenty five years is included, on the list, among the Syrian martyrs and those who vouched for true faith (Wace & Piercy, 1999)." from Cor-Episcopo K. Mani Rajan's 'Martyrs, Saints, and Prelates of the Syriac Orthodox Church Volume 2 published in 2012 on his website:
| feast_day =
| influences = Origen, St. Pamphilus of Caesarea, St. Constantine the Great, Sextus Julius Africanus, Philo, Plato
| influenced = St. Palladius of Galatia, St. Basil the Great, Rufinus of Aquileia, St. Theodoret of Cyrus, Socrates of Constantinople, Sozomen, Evagrius Scholasticus, Gelasius of Cyzicus, Michael the Syrian, St. Jerome, Philostorgius, Victorius of Aquitaine, St. Pope Gelasius I, Pope Pelagius II, Henri Valois, George Bull, William Cave, Samuel Lee, J.B. Lightfoot, Henry Wace
Eusebius of Caesarea (juːˈsiːbiəs; Εὐσέβιος τῆς Καισαρείας Eusebios tēs Kaisareias; 260/265 – 30 May 339), also known as Eusebius Pamphilus (from the Εὐσέβιος τοῦ Παμφίλου), was a Greek historian of Christianity, exegete, and Christian polemicist. In about AD 314 he became the bishop of Caesarea Maritima in the Roman province of Syria Palaestina. Together with Pamphilus, he was a scholar of the biblical canon and is regarded as one of the most learned Christians during late antiquity. 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" (not to be confused with the title of Church Father), he produced the Ecclesiastical History, On the Life of Pamphilus, the Chronicle and On the Martyrs.