Rome is a city with a rich history that has spanned many millennia. Its history can be dissected due to the city's use of layering. This has allowed historians and archaeologists to uncover a coherent history of Rome. Rome has been influenced by the Greeks since its founding. This is evident in both the art and architecture left behind from the Etruscans. Throughout its political history, propaganda has been used to influence public opinion about the current leader of Rome. Not only was this used by various emperors but also by the Catholic Church to assert its power and dominance. Rome has acted as a template for other western cities; therefore the art, architecture, and ideals of Rome are mirrored in other societies. This is part of why it is so important to study the history of Rome.