What did the Muslims gain from the crusaders?

Middle Aged England was to gain a great deal from the Crusades. Many items we now take for granted came from the time of the Crusades. As happens in many wars, the Crusaders plundered without mercy and took what they wanted from the people of what we now call the Middle East. The British Museum still houses treasures brought back from the Crusades in among its Byzantine collection. However, new ideas and household goods were also brought back as were new foodstuffs