This subject contains information from the "Lovecraft Circle" Myth Cycles, and while guided by HPL are not based on his work alone.

which yet, after the annihilation of its tenants, remains entire, so Arabs say, invisible to ordinary eyes, but occasionally, and at rare intervals, revealed to some heaven-favoured traveller.
~ "Irem, the City of Pillars" entry from the 9th Edition of the Encyclopædia Britannica , Lovecraft's commonplace book

Irem, or Irim, is the City of Pillars visited by the Mad Arab in the desert.

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