In 1095, Pope called for a crusade to liberate the city of from Muslim control, promising that each crusader would receive entrance into heaven and . People had many reasons for joining a crusade, including to defend Christendom and to .

In 1095, Pope Urban II called for a crusade to retake Jerusalem, a city sacred to Christians and then under Muslim rule. Therefore, the correct choice is Jerusalem. The other cities listed are not the city the crusade was called to liberate.

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