A painting by Italian Renaissance artist Raphael not seen for more than 40 years was sold at auction Thursday for 18.5 million pounds (US$37.2 million, 27.4 million EUR).
The portrait of Lorenzo de' Medici, a member of Florence, Italy's ruling family, was sold after being kept for nearly half a century in the private collection of an American art dealer.
Auctioneers at Christie's in London had expected the painting to sell for between 10 million pounds (US$20 million, 15 million EUR) and 15 million pounds (US$30 million, 23 million EUR) pounds.
The portrait was sold to a private collector biding on the telephone.
"There are only a few Raphael paintings that remain in private hands," Christie's spokesman Matthew Paton said. "We probably won't have another Raphael again for a lifetime."
Completed in 1518, two years before Raphael's death, the painting features a finely dressed Lorenzo de' Medici in gold and red brocade with delicate fur trim in front of a dark green background.
Painted on canvas - something Raphael rarely did because he preferred to paint on panels - the portrait is in superb condition, Paton said.
The choice of the city of Helsinki is not incidental as the capital of Finland had hosted US-Soviet negotiations on the limitation of nuclear stockpiles in 1969