I had a whole day free so decided to head down close to the Jordanian border and visit Bosra. This is an old Roman theatre from the 2nd Century AD, but appended with an Arab citadel from the 1100s.
All this was rather unusually built with black basalt rock, apart from some Roman columns (built with the usual lighter rock).
Around Bosra were many ruins from that era and some ruins have formed part of people’s homes … either the rock had been recycled … or people have built up against any historical structure that’s still standing.