Mnemosyne, the goddess of memory and controller of time, was the daughter of Uranus (Heaven) and the Gaea (Earth).

After the terrible war against the Titans was finally over, the Olympians asked Zeus to create divinities that would entertain them and celebrate their victory. Zeus went to see his wife Mnemosyne in Pieria and slept with her nine consecutive nights. Mnemosyne then gave birth to the nine Muses.