The following article is based on the thought of Marsilio de Padua and Thomas Hobbes through his acknowledged works: The Defender of Peace and Leviathan, for this reason, focuses on understanding not only the circumstances under which they arose.Their ideas, but also all the elements in which they approach and in which they separate.To this end, four common foundations were taken under which both constructed their political architecture and that competes to this study: the first, the natural condition of the man, the second, the figure of the political representation, the third, the institution of the sovereign and fourth, the relationship of civil power with the ecclesial.The possibility of understanding and relating such concepts will contribute to the dialogue between medieval and modern since the development of western philosophy.