What type of art historian was Kahnweiler ?
Caziel ( Kazimierz Józef Zielenkiewicz , 16 June 1906 - 25 August 1988 ) was a Polish artist who lived and worked in Paris during the inter-war period and who worked alongside a number of important figures of the School of Paris , including Pablo Picasso and the art dealer Daniel - Henry Kahnweiler .