Pierre Schlumberger

[4] Their collection was auctioned by Sotheby's over four days in November 2014, who called them "two of the most visionary collectors of the Twentieth Century.

[6] They lived in an 18th-century hôtel particulier in the Rue Férou, next door to Man Ray, restored by Barbe, with interior design by Valerian Rybar in "a provocative mix of classic and modern styles".

[5][6] They were prominent in New York and Paris society and hosted guests including Yves Saint Laurent, Andy Warhol, Rudolf Nureyev, Robert Rauschenberg, Christo, Man Ray, Salvador Dalí, and Roy Lichtenstein.

[4] In 1964, he bought Quinta do Vinagre [pt], a 16th-century manor with 103 acres (42 ha) near Sintra, Portugal, built for the local bishop.

[7][8] The singer Madonna was thought to have bought it for €18 million in 2017, but instead chose a smaller more "manageable" house nearby.