Modern Jordan sits atop one of the Roman Empire’s most consequential provincial frontiers. This map charts the distribution of Roman cities, military installations, roads, and monumental ruins across the country, revealing a dense and strategically coherent imperial presence that stretched from the Decapolis cities of the north to the Red Sea port of Aela (Aqaba) in the south.
WHAT THE MAP SHOWS:
Roman cities cluster heavily in the north, within and around the Decapolis region — a league of Hellenistic-Roman cities that includes Gerasa (Jerash), Gadara (Umm Qais), Pella (Tabqet Fahel), and the capital Philadelphia (Amman).
Monumental ruins appear at Amman and Petra, where theatres, temples, and civic infrastructure remain partially intact.
Military sites mark Mukawir (Machaerus) and Humayma, reflecting Rome’s concern with frontier security along the desert edge.
Mixed-period sites with Roman layers at Madaba and Aqaba indicate locations where Roman occupation overlaid earlier and later cultures.
The Via Traiana Nova, a Roman road built under Emperor Trajan after 106 CE, serves as the map’s central spine — a dashed line connecting Damascus to the Red Sea and anchoring the province of Arabia Petraea.
Three sites are UNESCO World Heritage sites - Umm el-Jimal, Umm ar-Rasas, and Petra -, while three are on the UNESCO tentative list - Quielbeh, Umm Qais, Tabqet Fahel
An inset map of Amman details four Roman monuments within the modern city: the Citadel, Odeon, Theatre, and Nymphaeum.
A bit of history
The geographic concentration of Roman cities in the Decapolis region is not accidental. These cities predated Roman annexation, having been established or reorganised under Hellenistic rulers following Alexander the Great’s campaigns. Rome inherited a functioning urban network and deepened it — adding roads, aqueducts, theatres, and administrative infrastructure. The Decapolis thus represents a zone of layered Hellenistic and Roman urbanism, distinct from the more sparsely settled southern desert.
The Via Traiana Nova is the map’s most consequential element. Built after Rome formally annexed the Nabataean Kingdom in 106 CE and created the province of Arabia Petraea, the road served military, commercial, and administrative functions simultaneously. It connected the grain-producing regions of the Hauran (in modern Syria) to the Red Sea trade terminus at Aela, integrating Arabia into Rome’s broader Mediterranean-Indian Ocean economic system.
The presence of Roman military sites at Machaerus and Humayma reflects a different logic: frontier control. Machaerus, a Herodian fortress later garrisoned by Rome, commanded the eastern approach to the Dead Sea. Humayma, further south, guarded the desert road and would later become the ancestral home of the Abbasid dynasty — a reminder that Roman infrastructure often outlasted Rome itself.
Sources
Encyclopedia Britannica
Wikipedia
Natural Earth Data