Archaeologists have discovered bronze age cities built by the Aryans in a remote Russian region, dating back to the beginning of Western civilisation in Europe.
Archaeologists have identified 20 of the spiral-shaped settlements that were built some 4,000 years ago shortly after the Great Pyramid in Egypt.
The buildings were believed to be used by the original Aryan race whose swastika symbol was adopted by the Nazis in the 1930s.
TV historian Bettany Hughes explored the desolate part of the Russian steppe which borders Kazakhstan this summer for a BBC Radio 3 programme, reports the Daily Mail.
She said: "Potentially, this could rival ancient Greece in the age of the heroes. Because I have written a lot about the Bronze Age world, there always seemed to be this huge missing piece of the jigsaw puzzle.
"We are all told that there is this kind of mother tongue, proto-Indo-European, from which all the languages we know emerge."
But because the region is so remote, the incredible cities have remained virtually unknown to the rest of Europe until now.
They are about the same size as several of the city states of ancient Greece and would have housed between 1,000 and 2,000 people.
Hughes was driven to the vast region by the expedition's chief archaeologist Gennady Zdanovich who pointed to the cities that were buried in the ground beneath them.
The language of the Aryans has been identified as the precursor to a number of modern European tongues. English uses many similar words such as brother, oxen and guest which have all been tracked to the Aryans.
The artefacts were daubed in swastikas which were used in ancient times as symbols of the sun and eternal life.
Hughes, visiting research fellow at the King's College in London, added: "Prof Zdanovich took me to this expanse of grass; you couldn't tell there was anything special. Then, as he pointed to the ground, suddenly I realised I was walking across a buried city.
"These ancient Indian texts and hymns describe sacrifices of horses and burials and the way the meat is cut off and the way the horse is buried with its master.
"If you match this with the way the skeletons and the graves are being dug up in Russia, they are a millimetre-perfect match."