民衆十字軍
The First Crusade, summoned in 1095, consisted of the unsuccessful People's Crusade followed by what became known as the Princes' Crusade that resulted in the final liberation of the Holy Land with the successful and bloody siege of Jerusalem in 1099. The Kingdom of Jerusalem was established, first under Godfrey of Bouillon, a Frankish leader of the Crusade, and lasting until the loss of the last stronghold at the siege of Acre in 1291.