How did the Crusades affect Europe's change from medieval Europe to modern Europe?its about how the crusades helped to change europe

There are at least two important ways in which the
Crusades led to the modernization of Europe.

First, the
Crusades reduced the prestige and power of the Catholic Church.  This led to more power
flowing to the monarchs of Europe.  This, in turn, started to lead to more modern forms
of government.

Second, the Crusades exposed Europeans to
vast amounts of knowledge that they had lacked before.  During the Middle Ages, the
Middle East was the center of learning and knowledge whereas Europe was relatively
backwards.  Through contact with the Middle East in the Crusades, Europeans came to be
aware of many new kinds of knowledge.  These things also helped to modernize
Europe.

Please follow the link for a detailed list of some
of the things Europeans learned from the Middle East.