Siriadic Columns
The Siriadic Columns were reported by Manetho, the 3rd century BC Egyptian historian, to have been two columns erected in Egypt, by Thoth before the Deluge, one of brick and the other of stone, in order to survive either flood or fire, on which it was said that the wisdom of the ancients was inscribed. The Siriadic Columns have been associated with the star Sirius, worshipped as Sothis by the Egyptian but have also been linked with Syria and Sarmatia, in western Scythia.
Frank Joseph speculates[104.253] that these columns “may have been the same stele inscribed with the history of Atlantis that were seen by Solon and Krantor” that provided the basis for Plato’s Atlantis narrative.
Egerton Sykes linked these columns with an Arab tradition regarding the pyramids(a).