If you are unfamiliar with the goddess Inanna, I recommend giving her a look. She is a Sumerian goddess, much of whom seems to have been assimilated into the Akkadian Ishtar. Her journey to the
Underworld has been reconstructed due to a greater availability of the fragmentary sources and the subject of much treatment. For a popular/scholarly reconstruction and treatment, see
Wolkstein & Kramer's book. It is not known with certainty if the Old Babylonian image below is of Inanna/Ishtar, Ereshkigal, or Lilitu/Lilith.