Four oil paintings have been discovered to be the work of 17th-Century Dutch master Rembrandt.
Study of an Old Man with a Beard is from a private collection
The works, which were thought to have been painted by Rembrandt's pupils, have been put on show at the Amsterdam museum dedicated to the artist.
They were identified as being by the artist during the preparatory work on an exhibition at the Rembrandthuis.
Experts say the paintings are of the artist's quality and have his characteristic unusual lighting.
It is believed they may have been studies for figures in some of Rembrandt's larger compositions.
Two of the paintings, Study of an Old Man in Profile and Study of an Old Man with a Beard, are from a US private collection.
The Detroit Institute of Arts owns one entitled Study of a Weeping Woman.
Study of a Woman in a White Cap was painted in 1640
The fourth picture, Portrait of an Elderly Woman in a White Bonnet, was painted in 1640 and is currently owned by a private collector.
It will go on sale at Sotheby's New York on 26 January and is estimated to be worth up to $4m (£2.2m).
The paintings are on show in the Rembrandthuis until 4 December.
The exhibition comes after a self-portrait by Rembrandt, worth an estimated £34m, was recovered by Danish police, nearly five years after it was stolen in a raid on Sweden's National Museum.
Four people were arrested last week during an operation at a Copenhagen hotel.