As a Titan daughter of Ouranos (Heaven), Mnemosyne was also a goddess of time. She represented the rote memorisation required, before the introduction of writing, to preserve the stories of history and sagas of myth. In this role she was represented as the mother of the Mousai (Muses), originally patron goddesses of the poets of the oral tradition.
Finally Mnemosyne was a minor oracular goddess like her sister-Titanes. She presided over the underground oracle of Trophonios in Boiotia.