The Olympian gods, also known as the Twelve Olympians, were the principal deities in ancient Greek religion. They were considered to reside on Mount Olympus, the highest mountain in Greece. The Olympian gods were: Zeus, Hera, Poseidon, Demeter, Athena, Apollo, Artemis, Ares, Aphrodite, Hephaestus, Hermes, and Dionysus. These gods were believed to have control over various aspects of human life and nature, such as the sky, the earth, and the seas. They were often depicted in art and literature, and were the subject of many myths and legends in ancient Greek culture.