LONDON - Few art dealers have had such a significant impact on the history of art as Paul Durand-Ruel. The National Gallery's big spring exhibition for 2015 is called Inventing Impressionism and explores the role of the Parisian dealer Paul Durand-Ruel in creating the modern international art market. It will be a fascinating investigation of how Impressionism was originally nurtured and promoted by the great French dealer – it's a subject dear to my heart and one I explored extensively in my 2009 book The Ultimate Trophy (Prestel). My conclusion was that Impressionism would be perceived very differently today if it hadn't been for Durand-Ruel. As senior specialist in Sotheby's Impressionist and Modern Art department, I might not have the job I do today.

Edgar Degas’ The-Dance-Lesson, circa 1879. Courtesy National Gallery of Art, Washington.

Phil Grabsky, whose company Seventh Art makes brilliant films of major exhibitions for showing in cinemas, is in the final stages of editing his latest creation, Exhibition on Screen: The Impressionists. He interviewed me for the film, so we're much looking forward to an evening event at Sotheby's on 19 January when he will preview exclusive excerpts and we will discuss the forthcoming show and the phenomenon of Durand-Ruel in more detail. We will be joined by Ann Dumas, Curator at the Royal Academy, responsible for many of the major Impressionist exhibitions mounted in London and abroad in recent years. It should be a great evening - tickets are free.

Due to unprecedented demand tickets are now sold out, however please join the waiting list here and we will contact you if further tickets become available. Please do come and enjoy the late view even if you were unable to reserve a ticket as this is open to all.

An exclusive preview of excerpts from Exhibition on Screen: The Impressionists, with Philip Hook, director, Phil Grabsky and Ann Dumas, Curator at the Royal Academy

19 January
34-35 New Bond Street
London W1A 2AA