This wall painting (fresco) probably shows the riot between spectators from Pompeii and nearby Nuceria in Pompeii’s amphitheatre in AD 59. It was found in the House of Actius Anicetus (also sometimes called House of the Amphitheatre Painting), which is in the same region of Pompeii as Amarantus’s insula but a few blocks away.
The painting looks down on the amphitheatre from above without the whole awning over the top, so we can see inside. Around the outside there are trees and stalls and the town walls are visible. On the right hand side is the Large Palaestra (gymnasium) with a large swimming pool inside. The painting shows fights breaking out not only in the arena, but in the surrounding area as well. Some of the figures are holding weapons or throwing stones, others appear unarmed.
Romans often decorated their houses with events from mythology or history; perhaps the owner of this house chose a dramatic piece of local history to depict instead of the more usual myth or legend. It has been suggested that the owner of the house Actius Anicetus was himself an ex-Gladiator.