The idea of an ancient library underneath the Great Sphinx was first coined by American clairvoyant Edgar Cayce and soon gained traction.

Pointing to an area around the Sphinx, Dr Seyfzadeh added: “It starts here, extends forward about 12 metres and nine metres to the side. It’s a big place and the scan showed right angles, corners and sharp edges. They think this is a man-made chamber about five metres below us.”