During the Roman empire, the given title to its ruler was the one of emperor. He was not considered as a king but as a republic’s leader. His main charges were being the consul and censor, president of the Senate, the empire’s principal priest and chief of the army too. Going to Florence, we can notice it was a city-state in where there was not an unique figure to represent the goverment but institutions. This was a particular charactheristics of the republics, the name of those institutions were: the Great Council (in which all the citizens participated), the 80 Council (smaller to solve the problems of the Great one), and the Senority (9 representatives who had to prevent that none of the citizens being above others). Regardig to Venice, the ruler was called Dux. They were lifetime elected to rule the city-state by its aristocracy, this is why it was called „a crowned republic”. In this only person all the political and religious powers fell.