This is a vase from the Archaic Greek period. When Greece began to trade with Egypt and Near East, foreign styles began to influence their own myths and customs, and archaic art emerged. The thing that is most indicative of this era, is the subject matter and look of the vase. During this time red-figure vase painting became popular, and Greek artists experimented with foreshortening. During this time the Athens also established the Panathenaic games, which was like the olympics. So the figures on the vase represent the athletes of the games of this time.