* Constantinople served as the capital of the Byzantine Empire and was the primary target of the First Crusade.
* The city was captured by the Crusaders in 1204 and became the seat of the Latin Empire of Constantinople.
* The Latin Empire lasted until 1261 when it was reconquered by the Byzantines.
Jerusalem:
* Jerusalem was the ultimate goal of all the Crusades.
* The city had been captured by the Muslims in 638 CE, and its recapture became a symbol of Christian devotion and redemption.
* Jerusalem was captured by the Crusaders in 1099 and remained in Christian hands until 1187 when it was retaken by the Muslims.
Venice:
* Venice was a powerful maritime republic that played a vital role in the Crusades.
* Venetian ships transported Crusaders to the Holy Land, and Venetian merchants supplied them with food and weapons.
* Venice also provided financial support for the Crusades, and its doge, Enrico Dandolo, even participated in the Fourth Crusade.