Leonardo made to the Renaissance

This is like asking how the sun warms the earth. De Vinci and Michelangelo were the Renaissance. They embodied the new thinking and they expressed this in their art and work. This was the "rebirth" of scholarship, architecture, and visual arts with the restrictions of earlier thinking gone. The dynastic families that supported them and commissioned them to create the great works of art that we view today. They didn't see their work as great and they were very poor people, but without them the art world and the Renaissance wouldn't have been the same.