(CBS) - Many people know of Vincent Van Gogh's world-famous paintings, but a new one has just been made public. The painting is called "Sunset at Montmajour" and is a once in a lifetime find.
The painting now belongs to a private collector and will go on display at the Museum in Amsterdam on September 24.
"This is the first full-size painting by Vincent Van Gogh discovered in more than 85 years," said Axel Ruger, Director of the Van Gogh museum.
Sunset at Montmajour was first thought to be a fake, but museum experts in Amsterdam say a two year investigation proves the dutch master painted it.
"It is from his most prominent period in his career, from his period in Arles, when he was working in the South of France, in Provence."
Letters Van Gogh wrote to his brother about the piece helped convince art historians it is real.
He described the same landscape of oak trees, wheat fields, even the ruins of a Benedictine Abbey in the background.
Van Gogh painted his world famous, 'The Bedroom' in the same area of Southern France.
Museum officials say a Norwegian man stored Sunset at Montmajour in his attic for years because he was told it was not a Van Gogh.
The Van Gogh Museum rejected it - in part because it was not signed.
But Van Gogh did not always sign his work.
Art experts say Van Gogh's letters reveal the day "Sunset at Montmajour" was painted: July 4th, 1888.
The museum also says new chemical analysis and x-rays of the painting prove it is consistent with Van Gogh's other work.
There's no word on the estimated value of this masterpiece.
2820 East Saginaw Street, Lansing, MI 48912