Christian historiography fused biblical and Roman imperial history via Eusebius

Evidence

Ever since the fourth century, when Eusebius, bishop of Caesarea and adviser to Constantine, penned his Ecclesiastical History and his Chronicle, two historical traditions were inextricably linked: biblical history and Roman imperial history. During the age of Roman persecution of Christians, Christian writers had vilified Rome as the whore of Babylon, reincarnation of the despised enemy of the Old Testament, the Babylonians who in their arrogance constructed the tower of Babel and later destroyed the Temple of Jerusalem and led the Jews into captivity. Eusebius, writing to glorify Constantine and his Christian Roman empire, overhauled Christian historiography. — John V. Tolan, Saracens, 97

Categorization

• XREF: This is the historiographic machinery that later Christian writers would deploy to slot Islam (and its prophet) into the same typological slot formerly occupied by Babylon — grounding vault claims about how the West framed Islam via inherited biblical schema. — connects to: The Western idea that history moves toward an endpoint descends from Christian eschatology — Vincent Bevins, If We Burn: The Mass Protest Decade and…, 159
• DEFINE: Clarifies the eschatological template (six ages, Babylon as archetypal enemy) that structures how later Christian chroniclers such as Isidore will order and type the Saracens.