The evening of 14 August the museums, where are those pictures, went live in Facebook Live and talked about the artist and his famous series.
The event was attended by the van Gogh Museum in Amsterdam, the national gallery in London, the Philadelphia Museum of Art, the New Pinakothek in Munich and the Memorial Museum of art Seiji Togo in Tokyo.
A series of "Sunflowers" was created in 1888-1889 in Arles. The paintings have never been exhibited together in one exhibition.
The sixth picture is in a private collection for the last time it was exhibited in 1948. The seventh was destroyed by American bombing in Japan at the end of the Second world war.