On November 10, 2014, items from Mellon's collection of paintings, jewelry, furniture, and decorative objects were auctioned at Sotheby's in New York for a total of $158.7 million, including "Untitled (Yellow, Orange, Yellow, Light Orange)" by Rothko, which sold for $36.5 million, and another Rothko that went for $39.9 million. Three of her most important paintings, two by Rothko and one by Richard Diebenkorn, were sold privately before the Sotheby's auction for a reported $250 million. Proceeds from the sales benefited the Gerard B. Lambert Foundation, a charitable entity established by Mellon in memory of her father.