“Atlantis” is the contemporary pronunciation of “Atalantaya,” the city founded and created by Amel—a human abducted by Bravennan aliens who genetically enhanced him for the nefarious purpose of helping them devour the energy in suffering, especially the suffering among human mortals. The great city of Atlantis is Amel’s effort to stop the Bravennans and put an end to human suffering.
Atlantis appears in Prince Lestat and the Realms of Atlantis (2016). For more perspectives on the subject of the city of Atlantis in the Vampire Chronicles, read the Alphabettery entries Amel and Atalantaya.