For other uses, see Erebus.

The Treasury of Erebus was a belief among the ancient Vulcan people that concerned the peak of Mount Seleya. Many of these early Vulcans believed that the peak of the mountain contained the lair of a terrible ice demon. (TOS - Vulcan's Soul novel: Exodus)

Considering the origin of the Romulan people, its possible that this myth inspired the belief in the Halls of Erebus.
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