The West Theatre is the most dramatic structure at Umm Qais — a semicircular auditorium carved into the hillside and built almost entirely of black basalt. Originally constructed in the 2nd century AD, it could seat around 3,000 spectators and is still largely intact. The cavea (seating area) is in good condition, and the stage building retains much of its original stonework.
What sets this theatre apart from others in Jordan is the quality of the basalt construction: the dark stone gives it a sombre grandeur quite unlike the pale limestone theatres at Jerash or Amman. Climbing the upper rows rewards you with a good view over the surrounding ruins and the countryside beyond. The theatre occasionally hosts events and performances — ask at the site entrance if anything is scheduled during your visit.