Mythology Part 1: The Gods, The Creation..., Chapter 1: The Titans
The gods of the Greeks and Romans did not create heaven and earth; heaven and earth gave birth to the Titans, the first gods. The most important of these deities were Cronus, Atlas and Prometheus. Ocean was also a Titan. The twelve Olympians were the gods that followed the titans: Zeus, Hera, Poseidon, Hades, Athena, Apollo, Artemis, Aphrodite, Hermes, Ares, Hephaestus, and Hestia. There were many other lesser gods of both generations.