The Antonine Itinerary (Latin: Antonini Itinerarium) is a register of the stations and distances along the various roads of the Roman empire, containing directions how to get from one Roman settlement to another. According to the 1911 Encyclopædia Britannica, the Antonini Itinerarium is seemingly based on official documents, probably of the survey organized by the Roman emperor Julius Caesar, and carried out under Augustus. Due to the scarcity of other extant sources of this type of information, it is a very valuable source.
Nothing is known with certainty as to the date or author. Scholars consider it likely that the original edition was prepared at the beginning of the 3rd century; the oldest extant copy is assigned to the time of Diocletian. Although traditionally ascribed to the patronage of Antoninus Augustus, if the work was written or promoted by one of the emperors, he was most likely to be Antoninus Caracalla.
Read more about Antonine Itinerary: Iter Britanniarum, Hispania