A journalist takes a closer look at the previously contested painting by Dutch master Vincent van Gogh, a 1889 self-portrait, of which the authenticity was confirmed during a press conference in Amsterdam, Netherlands, Monday, Jan. 20, 2020. The painting, which belongs to the National Museum in Norway, was painted at the Saint-Paul de Mausole psychiatric institution in Saint-Remy de Provence, France. (AP Photo/Peter Dejong)

Van Gogh Museum's senior researcher Louis van Tilborgh gestures as he talks to journalists about the previously contested painting by Dutch master Vincent van Gogh, a 1889 self-portrait, of which the authenticity was confirmed during a press conference in Amsterdam, Netherlands, Monday, Jan. 20, 2020. The painting, which belongs to the National Museum in Norway, was painted at the Saint-Paul de Mausole psychiatric institution in Saint-Remy de Provence, France. (AP Photo/Peter Dejong)

Norway's National Museum curator Mai Britt Guleng talk about the previously contested painting by Dutch master Vincent van Gogh, a 1889 self-portrait, left, of which the authenticity was confirmed during a press conference in Amsterdam, Netherlands, Monday, Jan. 20, 2020. The painting, which belongs to the National Museum in Norway, was painted at the Saint-Paul de Mausole psychiatric institution in Saint-Remy de Provence, France. (AP Photo/Peter Dejong)

Van Gogh Museum's senior researcher Louis van Tilborgh gestures as he talks to journalists about the previously contested painting by Dutch master Vincent van Gogh, a 1889 self-portrait, of which the authenticity was confirmed during a press conference in Amsterdam, Netherlands, Monday, Jan. 20, 2020. The painting, which belongs to the National Museum in Norway, was painted at the Saint-Paul de Mausole psychiatric institution in Saint-Remy de Provence, France. (AP Photo/Peter Dejong)

The previously contested painting by Dutch master Vincent van Gogh, a 1889 self-portrait, of which the authenticity was confirmed during a press conference in Amsterdam, Netherlands, Monday, Jan. 20, 2020. The painting, which belongs to the National Museum in Norway, was painted at the Saint-Paul de Mausole psychiatric institution in Saint-Remy de Provence, France. (AP Photo/Peter Dejong)

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, gives extra explanation. Press conference on the research results on new findings about a painting by Vincent Van Gogh. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte

[The following text was translated automatically] The Netherlands Amsterdam. 20-01-2020 Press conference on the research results on new findings about a painting by Vincent Van Gogh. Louis van Tilborgh, Sernior researcher at the Van Gogh Museum, provides additional explanation. The Van Gogh Museum in Amsterdam and the Nasjonalmuseet in Osle announce that the painting Self-portrait from the Norwegian museum's collection is actually by Vincent van Gogh. Photo: Ramon van Flymen / Hollandse-Hoogte