Lovecraft circle Seal

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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