Ancient Greeks believed that the world was ruled by many gods, each of which carried their own special powers and stories. Mount Olympus was their home from where they ruled mankind. The myth has it that Athena (the goddess of wisdom, courage, inspiration, civilization, law and justice, just warfare, mathematics, strength, strategy, the arts, crafts, and skill.) and Poseidon (the god of the sea) competed to become the guardian of of Athens. Poseidon gave the city the gift of water but Athena won the favor of the other Gods with her olive tree. Athen's is known to be the worlds oldest city.