The Greek people thought there were many different types of gods, all with different powers like Zues the god of sky, Hera god of marriage, Aries god of war, and so on. One of the important ones were Zeus, Hera, Poseidon, Demeter, Athena, Apollo, Artemis, Ares, Aphrodite,Hephaestus, Hermes, and either Hestia or Dionysus. There are twelve of them. Athens held a five-day festival celebrating the gods of rebirth. The greeks had many traditions with the festivals that they celebrated for the gods. Some of the most important ones were Olympic games, which were held in honor of Zeus, and the Pythias games, held at Delphi in honor of Apollo. On festible in Athens, held to honor Dionysos, involves a competition between playwrights.