A painting by Rembrandt is expected to fetch a record price when it goes to auction in London on 8 December.
The work, entitled Portrait Of A Man, Half-Length, With His Arms Akimbo, was painted in 1658 and has not been seen in public for almost 40 years.
Christie's have given the portrait a pre-sale estimate of £18 - £25 million. The previous auction record for a Rembrandt is £19.8 million, set in London in 2000.
The BBC reports the art market has suffered during the global recession.
The painting was last sold at auction in 1930 for £18,500. In the 1950s, it was donated to Columbia University in the United States - before being sold again, to a private collector, in 1974.
It was last seen in public in 1970 at an exhibition in Detroit.