dating from the end of the first century. To give an idea of its size, it used to shelter over two hundred dwellings and three churches built into the two tiers of arches that form its oval surround. This medieval quarter was cleared in 1830 and the Arčnes was once more used for entertainment. Today, though missing its third storey and most of the internal stairways and galleries, it's still a very dramatic structure and a stunning venue for performances, seating 20,000 spectators