Before the end of the 1st century BCE a temple platform (the acropolis) was created along the western edge of the plateau. Recent excavations have shown that the town continued to be inhabited by the Nabataeans continuously from this period until its destruction by
earthquake in the early 8th century CE. Sometime towards the end of the 1st century BCE the Nabataeans began using a new route between the site of
Moyat Awad in the
Arabah valley and Avdat by way of
Makhtesh Ramon. Nabataean or Roman Nabataean sites have been found and excavated at Moyat Awad (mistakenly identified as Moa of the 6th century CE Madeba Map), Qatzra, Har Masa,
Mezad Nekarot, Sha'ar Ramon (Khan Saharonim), Mezad Ma'ale Mahmal and Grafon. Avdat continued to prosper as a major station along the
Petra-
Gaza road after the Roman annexation of Nabataea in 106 CE. Avdat, like other towns in the central
Negev highlands, adjusted to the cessation of
international trade through the region in the early to mid 3rd century by adopting agriculture, and particularly the production of wine, as its means of subsistence. Numerous terraced farms and water channels were built throughout the region in order to collect enough run-off from winter rains to support agriculture in the hyper-arid zone of southern Palestine. At least five wine presses dated to the Byzantine period have been found at the site. In the late 3rd or early 4th century (probably during the reign of
Diocletian) the
Roman army constructed an army camp measuring 100 x 100 m. on the northern side of the plateau. Elsewhere at the site, an inscription was found in the ruins of a tower describing the date (293/294 CE) and the fact that one of the builders hailed from Petra. Around this time a bath house was constructed on the plain below the site. The bath house was supplied with water by way of a well, tunneled 70 meters through bedrock. Sites along the Petra-Gaza road were apparently used by the Roman army in the 4th and 5th centuries when the road continued to function as an artery between Petra and the Nabataean
Negev settlements. Pottery and coins from the late 3rd to the early 5th century have been found at Mezad Ma'ale Mahmal, Shar Ramon and Har Masa and Roman milestones line part of the road between Avdat and Shar Ramon. A fort with four corner towers was constructed on the ruins of early Nabataean structures north of Avdat at Horvat Ma'agora. Milestones have been found on along the Petra Gaza road north at Avdat between Avdat and Horvat Ma'agora and further up the road towards
Halutza (Elusa). The early town was heavily damaged by a major (probably local) earthquake, sometime in the early 5th century CE. In the ruins of this destruction a Nabataean inscription, in black ink on plaster, was found bearing a blessing of the Nabataean god,
Dushara. The inscription was written by the plasterer, one Ben-Gadya. This is the latest Nabataean inscription ever found in Palestine. A wall was built around the later town, including a large area of man-made caves, some of which were partially inhabited in the Byzantine period. Under
Byzantine rule, in 5th and 6th century, a citadel and a monastery with two churches were built on the acropolis of Avdat. Saint Theodore's Church is the most interesting
Byzantine relic in Avdat. Marble tombstones inserted in the floor are covered with
Greek inscriptions.
St. Theodore was a Greek
martyr of the 4th century. The Monastery stands next to the church and nearby a lintel is carved with lions and it marks the entrance to the castle. During an investigation of a two-hectare residential sector, comprising stone-built, multi-room cave dwellings on the southern slope of the ancient city, evidence of intensive activity in the Early Islamic period, ca. CE 650–900, was uncovered. The site was chosen for the excavation due to the concentration of sketched paintings in red, including crosses and a possible portrayal of St. Theodore. Analysis of organic waste samples brought back dates expected from the Byzantine period, but also several from the
Umayyad Caliphate and
Abbasid Caliphate eras, that were corroborated by findings of pottery fragments from ware produced at
Khirbet al-Mafjar. ==Historical sites==