Thadée Natanson, born Warsaw, March 28, 1868; died Paris, August 26, 1951, lawyer, businessman, journalist, collector and critic of French art. (https://fr.wikipedia.org/wiki/Thad%C3%A9e_Natanson) Thadée Natanson, a founder of La revue blanche. In his capacity as the magazine's principal art critic, Thadée was to be an important and increasingly enthusiastic champion of Vuillard's art; moreover, he was married to Misia Godebski, the beguiling and ebullient, impulsive and kittenish muse to at least 2 generations of painters, poets, composers, and playwrights. From the mid-1890s to the end of the decade, Vuillard's intimacy with the Natansons grew to the point that he saw them almost daily, either in their rue Saint-Florentin apartment or during his long sojourns at their country houses in Valvins.... (http://www.19thc-artworldwide.org/autumn02/82-autumn02/autumn02article/260-the-thadee-natanson-panels-a-vuillard-decoration-for-s-bings-maison-de-lart-nouveau)