Art & Photography
Unknown Warhol silkscreen offered by Col. Kirk's Auction Gallery
The unsigned Warhol piece has never sold at auction before, being previously unknown
Unknown Hans Memling panel to see $1.5m at Sotheby's?
The previously unknown Hans Memling panel will be offered for the first time in 150 years
Unknown Thomas Gainsborough portrait to make $45,000?
A previously unknown portrait from Thomas Gainsborough will auction at Bonhams
Stanley Spencer 'unknown' painting could bring $55,490 at Bonhams
Three previously unknown paintings by Sir Stanley Spencer will auction in May
