A general assembly of all the Greeks being called, Aristides proposed a decree, that the deputies and religious representatives of the Greek states should assemble annually at Plataea, and every fifth year celebrate the Eleutheria, or games of freedom. And that there should be a levy upon all Greece, for the war against the barbarians, of ten thousand spearmen, one thousand horse, and a hundred sail of ships; but the Plataeans to be exempt, and sacred to the service of the gods, offering sacrifice for the welfare of Greece. These things being ratified, the Plataeans undertook the performance of annual sacrifice to such as were slain and buried in that place; which they still perform in the following manner. On the sixteenth day of Maemacterion (which with the Boeotians is Alalcomenus) they make their procession, which, beginning by break of day, is led by a trumpeter sounding for onset; then follow certain chariots loaded with myrrh and garlands; and then a black bull; then come the young men of free birth carrying libations of wine and milk in large two - handed vessels, and jars of oil and precious ointments, none of servile condition being permitted to have any hand in this ministration, because the men died in defence of freedom; after all comes the chief magistrate of Plataea, (for whom it is unlawful at other times either to touch iron, or wear any other colored garment but white), at that time apparelled in a purple robe; and, taking a water - pot out of the city record - office, he proceeds, bearing a sword in his hand, through the middle of the town to the sepulchres. Then drawing water out of a spring, he washes and anoints the monuments, and sacrificing the bull upon a pile of wood, and making supplication to Jupiter and Mercury of the earth, invites those valiant men who perished in the defence of Greece, to the banquet and the libations of blood. After this, mixing a bowl of wine, and pouring out for himself, he says, "I drink to those who lost their lives for the liberty of Greece." These solemnities the Plataeans observe to this day. Plutarch, Lives , Aristides