 With the early artist relationships, like Kahnweiler had, Rosenberg gave the artists financial security by agreeing to buy their works on the basis of an exclusive contract.Rosenberg lent Picasso money after his honeymoon with the ballerina Olga Khokhlova and found them an apartment in Paris next to his own family home, generosity which resulted in a lifelong friendship between these two very different men.Rosenberg's purchases from Picasso included "Nude, Green Leaves and Bust" (1932), a portrait of Picasso's mistress Marie-Thérèse Walter, which Rosenberg sold in New York in 1951 to Frances Lasker Brody.