Venice
Venice has grown wealthy during the renaissance due to transporting knights during the crusades and from eastern trade. They would transports good from all over Europe to places the were accessible by the Mediterranean Sea.
Florence
Florence contributed the most during the renaissance, therefore it is also known as the Cradle of the Italian Renaissance. Florence became wealthy through trading textlies like wool.
Genoa
Genoa gained wealth through trade and commerce. Also like Venice, Genoa gained wealth from transporting knights during the crusades.