The painting has been identified as van Gogh after `` extensive research , '' a museum says . `` A discovery of this magnitude has never before occurred , `` Sunset at Montmajour says . The picture is from 1853-1890 , during a period considered by many to be the high point of his career . It depicts a landscape in the south of Amsterdam , where a van Gogh was working at the time .
The painting has been identified as a van Gogh after `` extensive research , '' a museum says . `` A discovery of this magnitude has never before occurred , '' the Van Gogh Museum says . The picture is from 1888 , during a period considered by many to be the high point of his career . It depicts a landscape in the south of France , where van Gogh was working at the time .