A series of crude graffiti drawn on the walls of a London flat are the "Lascaux of Punk," according to a controversial claim made by two British archaeologists who compared the rude markings to Paleolithic cave art.

Found behind cupboards in the upper room of a two-storey 19th-century house at 6 Denmark Street in London, the intact graffiti was drawn by the Sex Pistols' John Lydon (aka Johnny Rotten). The Sex Pistols ushered in an era of punk in the United Kingdom in the 1970s. 

According to John Schofield, of the Department of Archaeology at the University of York, and independent researcher Dr Paul Graves-Brown, the Pistols "cave art" is worthy of being reviewed in the same way archaeologists examine prehistoric art. While Lydon drew the pictures, other members of the band wrote some text on the walls....