Who were the twelve deities that resided on mount Olympus?

Zeus (King of gods, god of sky)

Hera (Queen of gods, goddess of marriage)

Poseidon (god of sea)

Athena (goddess of wisdom and battle)

Artemis (goddess of hunting and chastity/maidens (+later the moon))

Apollo (god of music and healing (+ later the sun))

Hermes (god of travelers, thieves, messengers etc.)

Ares (God of War)

Dionysus (god of wine)

Hephaestus (god of the forge)

Aphrodite (goddess of love)

Demeter (goddess of the spring time and the harvest)