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

The real Maria Callas met Aristotle Onassis during her marriage to Giovanni Battista Meneghini. Callas and Meneghini were married from 1949 to 1959. They met in Italy in 1947, ...

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 ...

A Greek Cypriot purchased the legendary Aristotle Onassis aircrafts of Olympic Airways before they were destined for the ...

Onassis, a giant Amazon River turtle, has lived at the zoo since 1969. ... She was named after shipping magnate Aristotle Onassis, who had married Jackie Kennedy a few months prior.

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.

Onassis, a giant Amazon River turtle, has lived at the zoo since 1969. No one knows exactly how old she is, but she's still curious and healthy.