A work by the English romantic painter John Constable has sold for £22,441,250 - a world record price at auction for the artist.
The Lock, finished in 1824, is the fifth in a celebrated series of six large-scale paintings of the Stour Valley that Constable exhibited between 1819 and 1825.
The painting, remarkable for its excellent state of preservation and from the collection of Baroness Carmen Thyssen-Bornemisza, sold at Christie's in London.
The auction house said the series of paintings defined Constable's artistic maturity and "represent a distillation of his profound emotional and artistic response to the scenery of his native Suffolk".
Among the series are several of the artist's most renowned works, including The White Horse (1819; New York, The Frick Collection), and The Hay Wain (1822; London, National Gallery).
The Lock was bought at the 1824 Royal Academy exhibition by James Morrison, who was the son of an innkeeper and who rose to become one of the wealthiest British merchants of the 19th century and an outstanding collector of old and modern masters.
The painting remained in the possession of his descendants until 1990.
The buyer of the Constable chose to remain anonymous.
On the night sales totalled £85,057,100 for 54 lots sold.
The selling price of The Lock included the buyer's premium.