Sunset at Montmajour by Vincent van Gogh.

A long-lost Vincent Van Gogh painting, the first full-size canvas by the Dutch master discovered since 1928, has been identified by the Dutch Van Gogh Museum.

Sunset at Montmajour depicts trees, bushes and sky with Van Gogh’s familiar thick brush strokes. He described it in a letter to his brother, Theo, saying it was painted on July 4, 1888. Museum experts said it was authenticated by letters, style and materials used, and they had traced its history.

Museum director Axel Rueger described the discovery as a “once in a lifetime experience.” The museum has not said who owns the canvas.

The famously troubled Van Gogh died of a self-inflicted gun wound in 1890, having only sold one painting.