“Like the Army of God’s Camp”: Political Theology and Apocalyptic Warfare at Charlemagne’s Court

Abstract

The political theology of Charlemagne’s court drew upon theological concepts to interpret contemporary events and fashion an identity for the populus christianus of the Frankish empire. The formulation of this political theology occurred against a background of political and military crises. A number of sources written by his ecclesiastical courtiers refer to the castra Dei, the militant ecclesia, or “assembly of God’s people,” commanded by Charlemagne, on pilgrimage through the dangerous last days of world history. These apocalyptic dangers called for enhanced royal authority to defend the castra Dei through a program of correction. Correction supported consensus among the king and his ecclesiastical and lay magnates, stabilizing the kingdom internally. Correction also established “liturgical frontiers” separating the orderly and peaceful castra Dei from the world’s chaotic paganism and heresy. This attempt to distinguish the castra Dei from its spiritual enemies gave Charlemagne’s empire coherence in its political and military conflicts with enemies over contested frontier zones. The apocalyptic rhetoric surrounding references to the castra Dei was connected to political necessity, rather than expectation of an imminent apocalypse.