The 40-year-old granddaughter of Aristotle Onassis made her second public appearance in the last three years – The "Onassis curse," Doda’s betrayal, and her longing for a child ...

Jack Schlossberg, a Kennedy heir known for making wild public statements on social media, fired off at his late grandmother ...

Aristotle Onassis had a longtime affair with opera singer Maria Callas that lasted until his death in 1975 at age 69. Callas is the subject of a biopic starring Angelina Jolie.

Aristotle Onassis and Maria Callas 'couldn't live without the other one,' his longtime personal secretary Kiki Feroudi Moutsatsos tells PEOPLE. And Onassis' wife, Jackie Kennedy, knew about the ...

Aristotle Onassis and Maria Callas 'never stopped seeing each other,' even after his marriage to Jacqueline Kennedy, his longtime personal secretary Kiki Feroudi Moutsatsos tells PEOPLE.

Maria Callas visited her longtime lover Aristotle Onassis on his deathbed in a secret meeting arranged so that his wife Jacqueline Kennedy Onassis wouldn't find out. The moment is dramatized in ...

1957: Maria Callas and Aristotle Onassis meet at a party thrown by Elsa Maxwell. In Venice, Italy during summer 1957, famed gossip columnist Elsa Maxwell introduced Callas and Onassis.

1957: Maria Callas and Aristotle Onassis meet at a party thrown by Elsa Maxwell. Keystone-France // Getty Images Maxwell, Callas, and Onassis in Venice, Italy, July 1957.

The Onassis family is synonymous with wealth, intrigue, and opulence. From Aristotle Onassis’s vast Greek estate to Jackie Kennedy Onassis’s stunning Manhattan apartment, their homes reflect a legacy ...

Aristotle Onassis and Maria Callas Even after Onassis married Jackie on Oct. 20, 1969. “He was proud of that,” recalls Moutsatsos, who attended the wedding on his private island of Skorpios.