Location and city layout
The northern Palmyrene mountain belt
Palmyra lies 215 km (134 mi) northeast of the Syrian capital, Damascus, in an oasis surrounded by palms (of which twenty varieties have been reported). Two mountain ranges overlook the city; the northern Palmyrene mountain belt from the north and the southern Palmyrene mountains from the southwest. In the south and the east Palmyra is exposed to the Syrian Desert. A small wadi (
al-Qubur) crosses the area, flowing from the western hills past the city before disappearing in the eastern gardens of the oasis. South of the wadi is a spring,
Efqa. Pliny the Elder described the town in the 70s AD as famous for its desert location, the richness of its soil, and the springs surrounding it, which made agriculture and herding possible.[note 2]
Palmyra began as a small settlement near the Efqa spring on the southern bank of Wadi al-Qubur. The settlement, known as the Hellenistic settlement, had residences expanding to the wadi's northern bank during the first century. Although the city's walls originally enclosed an extensive area on both banks of the wadi, the walls rebuilt during Aurelian's reign surrounded only the northern-bank section. Most of the city's monumental projects were built on the wadi's northern bank, among them is the Temple of Bel, on a tell which was the site of an earlier temple (known as the Hellenistic temple). However, excavation supports the theory that the tell was originally located on the southern bank, and the wadi was diverted south of the tell to incorporate the temple into Palmyra's late first and early second century urban organization on the north bank.
Also north of the wadi was the Great Colonnade, Palmyra's 1.1-kilometre-long (0.68 mi) main street, which extended from the Temple of Bel in the east, to the Funerary Temple no.86 in the city's western part. It had a monumental arch in its eastern section, and a tetrapylon stands in the center. The Baths of Diocletian were on the left side of the colonnade. Nearby were residences, the Temple of Baalshamin, and the Byzantine churches, which include "Basilica IV", Palmyra's largest church. The church is dated to the Justinian age, its columns are estimated to be 7 metres (23 ft) high, and its base measured 27.5 by 47.5 metres (90 by 156 ft).
The Temple of Nabu and the Roman theater were built on the colonnade's southern side. Behind the theater were a small senate building and the large Agora, with the remains of a triclinium (banquet room) and the Tariff Court. A cross street at the western end of the colonnade leads to the Camp of Diocletian, built by Sosianus Hierocles (the Roman governor of Syria). Nearby are the Temple of Al-lāt and the Damascus Gate.