Arabia Petraea, also called Provincia Arabia or simply Arabia, was a frontier province of the Roman Empire beginning in the second century; it consisted of the former Nabataean kingdom in modern Jordan, southern modern Syria, the Sinai Peninsula and northwestern Saudi Arabia. Its capital was Petra. It was bordered on the north by Syria, on the west by Iudaea and Aegyptus.
It was annexed by Trajan, like many other eastern frontier provinces of the Roman Empire, but held onto, unlike Armenia, Mesopotamia and Assyria, well after Trajan's rule. (Its desert frontier was called the Limes Arabicus.) It produced no usurpers and no emperors (Philippus, though Arab, was from Shahbā, a Syrian city added to the province of Arabia at a point between 193 and 225—Philippus was born around 204). As a frontier province, it included a desert populated by the nomadic Saraceni, and bordering the Parthian hinterland.
Though subject to eventual attack and deprivation by the Parthians and Palmyrenes, it had nothing like the constant incursions faced in other areas on the Roman frontier, such as Germany and North Africa, nor the entrenched cultural presence that defined the other, more Hellenized, eastern provinces.
طك==Geography== The geographic makeup of Arabia has some variation. It includes the comparatively fertile Moab plateau, which received 200mm of annual rainfall, at the southernmost tip of which lays Petra which, along with Bostra (or Busra), are the political foci of the province. Inhospitability is the norm, though, and along with the desert proper that is the Sinai, the arid Negev, which extends north of the Sinai, is practically such. Along with this are the coastal areas around the Red Sea; the badlands known as Hismā that develop to the north of that coast; and the ever-present rocky butt.
Most of Arabia was sparsely populated, and its cities can be found concentrated to the north, toward the Jordan. The only major port is Aqaba, which can be found at the tip of a wide gulf from the Red Sea bearing the same name. There is some disagreement as to what was the capital of the province, with claims that Bostra, near the border of the province of Syria, as the sole capital and other claims that both Petra and Bostra served that purpose. Petra served as the base for Legio III Cyrenaica, and the governor of the province would spend time in both cities, issuing edicts from both. Upon annexation of the province, Bostra gained the appellative “Traiane” when Trajan declared it the capital while Hadrian performed the same ceremonial act for Petra when he became emperor.
The conquest of Arabia was not officially exulted until completion of the Via Nova Traiana. This road extended down the center of the province from Bostra to Aqaba. It isn’t until the project is finished that coins, featuring Trajan’s bust on the obverse and a camel on the reverse, appear commemorating the acquisition of Arabia. These coins are minted until 115, at which time the Roman imperial focus was turning farther eastward. The road links not only Bostra and Aqaba, which other than being a port doesn’t seem to hold much significance in the eyes of the imperial government, but also Petra, which sits at the center of the province, between the road’s two termini. Though Trajan declared Bostra to be the capital of the province, he also awarded Petra the status of metropolis, as a sign that he agreed in the matter of its importance with his successor, Hadrian, who considered it to be more dignified and historic.
Millar makes a case for a Graeco-Roman Hellenization in Arabia. It is an area, after all, that was not significantly hellenized during the rule of Alexander, and the locals originally spoke Aramaic and Nabataean, not Greek. So with the introduction of Roman rule, along with many aspects of classic Roman socialization, such as public works and glorification of the military, came an introduction of Greek cultural and social values. Arabia acclimates to the new culture so fully that it seems the original linguistic groups faded away. There were scattered Nabataean inscriptions during the period of imperial Roman rule.
When Septimius Severus came into power and stripped the Syrian city of Antioch of its status as Metropolis for its part in the rebellion and meted out punishment to any others who were unlucky enough to choose the wrong side, the Third Cyrenaica received the honorific “Severiana”. In addition, the governor of Arabia, P. Aelius Severianus Maximus, was allowed to continue in his post in reward for his loyalty. Syria was split into two and Arabia was expanded to include the Leja’ and Jebel Drūz, rough terrain south of Damascus, and also the birthplace of M. Julius Phillipus—Phillip the Arab.
Severus had enlarged a province that was already huge. He then proceeded to enlarge the empire, through the conquest of Mesopotamia. The transfer of the Leja’ and Jebel Drūz seemed to have been part of a shrewd series of political acts on the emperor’s part to consolidate control of the area before this conquest. Arabia became the ideological power base for Septemius Severus in the Roman Near East. The obvious need to mitigate and tame the power of the province of Syria, which had shown itself over and over to be a hotbed of rebellion, was then accomplished in three parts: The aforementioned reorganization of Syria into two political units, the reduction of its territory in favor of Arabia, and the marriage of the emperor to the shrewd Julia Domna.
Arabia became such a symbol of loyalty to Severus and the empire, according to Bowersock, that during his war against Clodius Albinus, in Gaul, Syrian opponents propagated a rumor that the Third Cyrenaica had defected. That it would matter to an issue in France that a single legion in a backwater province on the other side of the empire would rebel indicates the political sway that Arabia had amassed. Not a land of significant population, or resources or even strategic position, it had become a bedrock of Roman culture. That it was an Eastern Roman culture didn't seem to dilute its effectiveness in matters in the west. It is precisely because Arabia had so little that it was able to define itself as Roman and that spurred its loyalty to an Imperial Rome that may never have existed. With Emperor Diocletian's restructuring of the empire in 284-305, Arabia province was enlarged to include parts of modern-day Israel. Arabia after Diocletian was a part of the Diocese of Oriens ("the East"), which was part of the Prefecture of Oriens. The province was conquered by the Arab Muslims under Caliph Umar in the seventh century.