How did the crusades bring changes to europe?

The Crusades changed Europe as the Europeans have started to take interest in traveling and searching the whole world. They began trading their own goods. For example stones,perfumes,spices ,pearls, ivory etc.
There were other great impact and changes that happened by the crusades, for example feudalism and political effects. Feudalism has changed a lot before the crusades, for example the knights before the crusades had a lot of wealth by owning land. After the knights have given their land to the church and fought the crusade and lived they were poor. They were poor because they have sold all their wealth which is their piece of land. Another example is political effect. political effect also played a role for weakening feudalism, it also gave cities more power than before.