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Last Updated: Thursday, 19 May, 2005, 17:02 GMT 18:02 UK
Cave art hoax hits British Museum
Banksy's rock art
The British Museum said the rock was "in keeping with the other exhibits"
Fake prehistoric rock art of a caveman with a shopping trolley has been hung on the walls of the British Museum.

The rock was put there by art prankster Banksy, who has previously put works in galleries in London and New York.

A British Museum spokeswoman said they were "seeing the lighter side of it". She said it went unnoticed for one or two days but Banksy said three days.

Banksy also hung a sign saying the cave art showed "early man venturing towards the out-of-town hunting grounds".

It read: "This finely preserved example of primitive art dates from the Post-Catatonic era.

It looked very much in keeping with the other exhibits, the explanatory text was quite similar
British Museum spokeswoman
"The artist responsible is known to have created a substantial body of work across South East of England under the moniker Banksymus Maximus but little else is known about him.

"Most art of this type has unfortunately not survived. The majority is destroyed by zealous municipal officials who fail to recognise the artistic merit and historical value of daubing on walls."

Banksy is best-known as a graffiti artist who has attracted a cult following for stencilled designs that satirise authority and modern society.

He hung his own art in the Tate Britain in London in October 2003, which was not noticed until it fell to the ground, and has done the same in four New York galleries.

Banksy's painting in Tate Britain
Banksy has previously stuck a painting to the wall of Tate Britain
The British Museum praised the way his rock was hung and the style of the sign, which was "very similar" to their own design.

A spokesperson for Banksy said he sneaked the work into the museum on Monday and it was found on Wednesday.

He ran a competition on his website for fans to have their photographs taken with the rock, offering a shopping trolley as a prize.

A British Museum spokeswoman said: "We're reasonably confident that it hadn't been up for that long, maybe a couple of days.

We have loaned the rock to Banksy but we are still in the process of deciding what to do with it
British Museum spokeswoman
"It looked very much in keeping with the other exhibits, the explanatory text was quite similar."

It is now being exhibited at Banksy's new show, Outside Institut