Greek influences Roman art and architecture because they had some important factors that they put into their creations. For example they had perfect geometric ratios like with the dome buildings- they were idealized. The influence on the Tuscany was one of the main influences for Romans which is why they looked up to Greece. So the perfect proportions, and they also believed in showing true form. For example they did amazing sculptures on naked people because they enjoyed the art of true form. Also the art was the architecture. The Greeks would paint all over the buildings which is a tradition that carried onto Rome