The big wars between the Roman Empire and the Sasanian king Shapur in the mid-third century proved that Rome’s defenses on the Euphrates were insufficient. The Palmyrene rulers therefore built Fort Zenobia, named after their queen/empress, and now better known as Halebiye. It was rebuilt several times, a/o by the Byzantine emperor Justinian. This reconstruction is described in some detail by Procopius (Buildings, 2.8.8-25).
On the opposite bank is a similar fort, poorly preserved, now called Zalebiye. This gained some fame as the place of an Israeli air strike in September 2007.
Zenobia, which covers about twelve hectares, remains impressive: the fifteen massive towers and the praetorium are almost intact, just like Justinian’s fantastic walls. The southern wall is about 550 meters long and connects the citadel on the hill to the river; the northern wall is 350 meters long. The praetorium is adjacent to the northern wall, halfway up the hill: a multi-storeyed building with a very large hall that would have been called a knight room in more recent fortifications.
Less well preserved are the 385‑meter-long wall along the river, which had to contain the Euphrates, the bathhouse, the palaestra, the governor’s house, and the two basilicas. The East Basilica probably dates to the fifth century, the West Basilica was built by Justinian.
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