Hellenistic art
Few Greek wall paintings have survived the centuries.  However, we can study the Hellenistic influences in Roman frescoes, for example those of Pompeii or Herculaneum.  Certain mosaics provide a pretty good idea of the "grand painting" of the period:  these are copies of frescoes.  An example is the Alexander Mosaic, showing the confrontation of the young conqueror and the Grand King Darius III at the Battle of Issus, a mosaic which adorns the walls of the House of the Faun at Pompeii.  It is believed to be a copy of a work described by Pliny the Elder (XXXV, 110) which had been painted by Philoxenus of Eretria for King Cassander of Macedon at the end of the 4th century BC. The mosaic allows us to admire the choice of colours, the composition of the ensemble with turning movement and facial expressivity.