Question

What was the final outcome of the crusades

Answer 1

The emperor Frederick II  for a short time recovered Jerusalem by a treaty, but in 1244 A.D. the Holy City became again a possession of the Moslems. They have never since relinquished it. Acre, the last Christian post in Syria, fell in 1291 A.D., and with this event the Latin Kingdom of Jerusalem ceased to exist. The Hospitallers, or Knights of St. John, still kept possession of the important islands of Cyprus and Rhodes, which long served as a barrier to Moslem expansion over the Mediterranean.

The Results of the end of the Medieval Crusades 
The crusades, judged by what they set out to accomplish, must be accounted an inglorious failure. After two hundred years of conflict, after a vast expenditure of wealth and human lives, the Holy Land remained in Moslem hands. It is true that the First Crusade did help, by the conquest of Syria, to check the advance of the Turks toward Constantinople. But even this benefit was more than undone by the weakening of the Roman Empire in the East as a result of the Fourth Crusade.

:http://www.lordsandladies.org/end-of-medieval-crusades.htm

Answer 2

The effects of the Crusades on Europe of the Middle Ages were an important factor in the history of the progress of civilization. The effects of the Crusades influenced the wealth and power of the Catholic Church, Political matters, commerce, feudalism, intellectual development, social effects, material effects and the effects of the crusades also prompted the famous Voyages of discovery.