20th-century art collectors

Marjorie Merriweather Post (March 15, 1887 – September 12, 1973) was an American businesswoman, socialite, and philanthropist. She was the daughter of C. W. Post and the owner of General Foods Corporation. For much of Marjorie Post's life, she was known as the wealthiest woman in the United States.Post used much of her fortune to collect art, particularly Imperial-era Russian art, much of which is now on display at Hillwood, the museum which was her estate in Washington, D.C. She is also known for her mansion, Mar-a-Lago, in Palm Beach, Florida.

Johanna Ey (4 March 1864 – 27 August 1947) was a German art dealer during the 1920s. She became known as Mutter Ey (Mother Ey) for the nurturing support she provided to her artists, who included Max Ernst and Otto Dix.

August Thyssen (German: [ˈaʊɡʊst ˈtʏsn̩]; 17 May 1842 – 4 April 1926) was a German industrialist, founder and controlling shareholder of Thyssen & Co (presently ThyssenKrupp). He was a prominent member of the Thyssen family.

Marella Agnelli (Italian pronunciation: [maˈrɛlla aɲˈɲɛlli]; born Donna Marella Caracciolo di Castagneto [ˈdɔnna maˈrɛlla kaˈrattʃolo di kastaɲˈɲeːto]; 4 May 1927 – 23 February 2019) was an Italian noblewoman, art collector, socialite, style icon, and wife of Fiat S.p.A. chairman Gianni Agnelli. She often appeared in the fashion magazine Vogue. She was named to the International Best Dressed Hall of Fame List in 1963.