Nikon Painter (attributed), Lethykos (oil flask), c. 460-450 BCE, terracotta, 38.1 cm, Metropolitan Museum of Art, New York
Apollo (both Greek and Roman) is the god of the sun, beauty, moral order, oracles, prophecies, music, and poetry. He is the son of Zeus/Jupiter and Leto, and the twin of Artemis/Diana. He invented music, and plays his lyre for the gods.
While not depicted here, other attributes include a bow, arrow, and quiver, and the sun chariot. He is typically portrayed nude, though he often wears a tunic when depicted as a musician.