Qasr Al Hallabat Fort

On the site of Qasr al-Hallabat there was originally a Roman fort, built up from the beginning of the 2nd century AD on a former Nabatean outpost, as part of the Limes Arabicus (the Arabian frontier). Extended in 4th century AD, the fort was abandoned and then heavily damaged by the earthquake of 551 AD. Afterwards it was transformed into a monastery and a palace by the Ghassanids, using older black basaltic rock blocks to expand the Roman remains.