What memories died with the Eridians? And who will bear the weight of remembering?
— In-game description

The Forgotten Basilica is a location on the planet of Promethea in Borderlands 3.


This is the location of the Vault on Promethea and where the fight against its vault monster, The Rampager, takes place.


Notable Allies

Notable Enemies


Story Missions


  • Rhys mentions that Atlas was paved over this Vault, although he has refrained from opening it to prevent unforeseen consequences.
  • Title given by the game is "Eridian Ruin".
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