Word in latin, pax, pacis, which means peace, tranquility, calm, consent, silence. If we add any adjacent are some Latinism as pax romana, pax Hispanic... so we designate certain periods of history in which a State exercises hegemonic power over others causing an apparent social and political tranquility more based on the strength of power than in justice as it did at the time of the Emperor Augustus. Pax is also the international abbreviation for passenger in the tourism industry, the name of a Greek goddess, an asteroid of any city, of any surname