http://www.bbc.co.uk/programmes/articles/13KjBRFl3Mstytc68fZnv8K/how-a-jewish-collector-rescued-his-degenerate-art-from-the-grasp-of-the-nazis

Modern art never would have taken off without the dealers who promoted it, and here in Liege, the Boverie Museum is hosting a lavish exhibition devoted to one of the most influential art dealers of modern times. Paul Rosenberg championed Matisse, Braque, Leger and Picasso. As this fascinating show reveals, his life story encapsulates the evolution of modern art.