Introduction The district of the Quadragesima Galliarum et Portus Lirensis The district of the Publicum Portorii Illyrici Utriusque et Ripae Thraciae The district of the Quinquagesima and Quadragesima Hispaniarum The district of the Quattuor Publica Africae Sicilia, Achaia, Creta et Cyrenaica

The district of the Quadragesima Portuum Asiae et Bithyniae Aegyptus and the Vectigal Maris Rubri Syria and Judaea The customs administration Select bibliography

Roman columns marking the Julier Pass in Switzerland. Photo: Wikimedia, Adrian Michael.