First Crusade: The Siege of Jerusalem begins

The Siege of Jerusalem in 1099 was the climactic event of the First Crusade, marking both its bloody apex and a turning point in medieval Christian-Muslim relations. After years of marching and brutal fighting through Anatolia and the Levant, the Crusader army—composed mainly of French and Norman knights—arrived outside the heavily fortified city in June 1099. Jerusalem was under the control of the Fatimid Caliphate at the time, and its defenses were formidable. With limited supplies and no siege equipment initially, the Crusaders struggled to maintain morale and coherence. However, through resourcefulness—using timber from nearby forests to build towers and ladders—and the arrival of reinforcements and Genoese engineers, the Crusaders mounted a final coordinated assault in mid-July.

On July 15, 1099, the Crusaders breached the city’s walls and unleashed a devastating massacre that became infamous. Christian sources celebrated the victory as divine providence, while Muslim and Jewish accounts recorded the bloodshed that followed: indiscriminate killings in the streets, mosques, and synagogues. Estimates vary, but thousands were slaughtered. The Crusaders established the Kingdom of Jerusalem shortly afterward, installing Godfrey of Bouillon as the “Defender of the Holy Sepulchre” rather than king, out of reverence for Christ. This siege not only solidified Crusader control over the Holy Land for nearly a century but also planted deep seeds of enmity and conflict between the Islamic world and Christendom—an echo that would resonate for generations.