In 1968 an Italian archaeologist, Mario Napoli, excavating a small necropolis about one mile south of Paestum, discovered a tomb decorated with panels, some of which are shown below. They are now in the museum at Paestum.
To quote Wikipedia: ‘Among the thousands of Greeek tombs known from this time (roughly 700-400BC) this is the only one to have been decorated wir frescoes of human subjects.’