In September 2013, his long-lost ''Sunset at Montmajour'' was declared authentic.
In September 2013, his long-lost ''Sunset at Montmajour'' was declared authentic.
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:... researchers examined the provenance of the work, and dug up old letters and inventory from a Van Gogh collection. ... this specific piece was described in two letters and was listed among Theo van Gogh's collection as number 180, and that number can still be seen on the back of the canvas.<ref>[http://www.dailymail.co.uk/news/article-2415973/The-lost-Van-Gogh-Painting-Norwegian-attic-confirmed-priceless-work-Dutch-master.html Painting found in Norwegian attic is confirmed as priceless work by Dutch master]</ref>
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:"... researchers examined the provenance of the work, and dug up old letters and inventory from a Van Gogh collection. ... this specific piece was described in two letters and was listed among Theo van Gogh's collection as number 180, and that number can still be seen on the back of the canvas." <ref>[http://www.dailymail.co.uk/news/article-2415973/The-lost-Van-Gogh-Painting-Norwegian-attic-confirmed-priceless-work-Dutch-master.html Painting found in Norwegian attic is confirmed as priceless work by Dutch master]</ref>