ChronoFive
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Setting the scene
By 1095, the Byzantine Empire was desperate. After the disaster at Manzikert in 1071, Seljuk Turks had seized most of Anatolia. Emperor Alexios I Komnenos appealed to Pope Urban II for mercenaries to reclaim lost territory. Urban, elected in 1088, saw an opportunity to heal the East-West Schism of 1054, assert papal authority over secular rulers, and redirect the violent energies of European knights. He convened the Council of Clermont in November 1095 to address church reforms and respond to Alexios's plea.
What happened
On November 27, 1095, Urban delivered his famous sermon to a crowd outside Clermont's cathedral. According to contemporary accounts, he described atrocities against Eastern Christians, the desecration of holy places, and called for a military expedition to aid Byzantium and liberate Jerusalem. He promised remission of sins—'Deus vult!' ('God wills it!') the crowd reportedly shouted. Urban framed it as both pilgrimage and holy war, offering spiritual rewards for armed service. The response was immediate and overwhelming, far beyond what Urban expected.
Why it still matters
Urban's call launched the First Crusade, though he died in 1099 before learning Jerusalem had fallen. The crusade departed in 1096, comprising both the disastrous People's Crusade and the organized princely armies. It succeeded beyond expectations, capturing Jerusalem in 1099 and establishing Crusader states. Urban's innovation—sanctifying violence for religious ends—created the crusading movement that would shape European-Muslim relations for two centuries. The Council of Clermont also excommunicated King Philip I of France for adultery and enacted church reforms, but history remembers it for the crusade alone.【6066792879410472863†L15-L18】
Background
Latin armies later marched toward Jerusalem. Even centuries later, this episode remains a reference point for how empires rise, fracture, and transform.