Amsterdam's Van Gogh Museum on Monday unveiled a newly discovered landscape painting from the height of the Dutch master's career, abandoned for years as a forgery in a Norwegian attic.
"Sunset at Montmajour," a large oil landscape from 1888, was unveiled to applause by the museum's director Axel Rueger as a "unique experience that has not happened in the history of the Van Gogh Museum."
Depicting a landscape of oaks in the south of France, the painting was brought to the museum from a private collection.
Researchers set to work and authenticated it based on comparisons with Van Gogh's techniques and a letter he wrote on July 4 1888, in which he described the painting.
It had been lying for years in the attic of a Norwegian collector who thought the painting was a forgery, after buying it in 1908.
"This discovery is more or less a once in a lifetime experience," said researcher Louis van Tilborgh, who helped with its authentication.
"All research indicates that this is a painting by Van Gogh," he added.