he pride of place attributed to the gate of the city by the Romans, the point at which the victorious general deposed his military insignia before entering the city, is preserved intact also in the construction of the gates in the big cities of the provinces.
Beyond the necessity to defend the new possessions with efficient walls, complet with gates able to resist the attacks, you can find all over the empire the evident desire of adorning the gates with a monumental and commemorative quality.