Aristotle Onassis and Maria Callas 'couldn't live without the other one,' his longtime personal secretary Kiki Feroudi ...

Following the death of President John F. Kennedy, widow Jackie Kennedy remarried Greek businessman Aristotle Onassis in 1968, ...

Aristotle Onassis' longtime personal secretary Kiki Feroudi Moutsatsos tells PEOPLE about his affair with Maria Callas ...

Opera singer Maria Callas had a years-long relationship with businessman Aristotle Onassis. His sudden marriage to Jacqueline ...

New details the most mysterious love triangles of the 20th century, that of Aristotle Onassis Maria Callas and Jackie Kennedy ...

Angelina Jolie spoke candidly about discussing difficult topics with her sons Pax and Maddox while filming "Maria," read ...

If you want to learn more about who the real Maria Callas was before watching Angelina's latest acclaimed performance—which ...