This painting is from the burials at Tarquinia where a large number of Etruscan frescoed tombs have been found and opened to the public. The ancient Etruscans are known for having passed on to the ancient Romans the concept and love of gladiatorial combat, boxing and wrestling as entertainment
This is the Senate of the Roman Republic. During this period of Rome's history, the Senate, literally "body of old men," held great authority over many things. They were involved in the issues of military conflicts and in the overseeing of other civil government in Rome.