The panleonist theory proposes that a highly advanced civilisation existed on the Earth during during the precessional age of Leo (c. 10900-8700 BC), but was destroyed by a cataclysm circa 10500 BC and hence became a ‘lost civilisation’. The theory proposes that the lost civilisation encoded the date 10500 BC into their monuments (e.g. by astronomical alignments) so as to commemorate the date of the cataclysm.
The panleonist theory is best known from the writings of Robert Bauval, Adrian Gilbert and Graham Hancock. But it has its roots in an assortment of different writings. Firstly, in Plato’s story of Atlantis, which recalled the destruction of an advanced civilisation nine thousand years before the time of Solon, i.e. c. 9600 BC. Secondly, in the prophecies of certain mystics, such as Edgar Cayce. And thirdly, in the writings of Zecharia Sitchin, who dated the beginning of history to the Great Flood in 11000 BC, at the beginning of the age of Leo.
