No discussion about art in Ancient Rome can be complete without looking into mosaics. The Romans did not invent the art of mosaics but having found what they did- they took the art form to a complete new level. The most glorious example being the Alexander (floor) Mosaic discovered in the House of the Faun at Pompeii.
Featured here is a much simpler monochrome mosaic in the style of mosaics found at Ostia. Photographed at the Vatican Museum.