What contributed to the growth of wealth in Italian cities?

The growth and development of the wealth of medieval Italy was facilitated by Mediterranean trade. The fact is that the territory of modern Italy was a transit point for trade in the old days. For example, Venetian merchants are known. In addition, active trade facilitated the development of local Italian usury and loan. Local producers and artisans have always been renowned for their fine and quality workmanship, which also influenced the economic state of trade and the wealth of Italy.