Aristotle Onassis and his yacht "Christina O". Onassis died at age 69 on 15 March 1975 at the American Hospital of Paris in Neuilly-sur-Seine, France, of respiratory failure, a complication of the myasthenia gravis from which he had been suffering during the last years of his life. Onassis was buried on his island of Skorpios in Greece, alongside his son, Alexander. Onassis' will established a charitable foundation in memory of his son, named the Alexander S. Onassis Public Benefit Foundation, based in the tax haven of Vaduz in Liechtenstein, and headquartered in Athens. The foundation received 45% of Onassis' estate, which would
Maria Callas Italy. The renunciation also helped her finances, as she no longer had to pay U.S. taxes on her income. The relationship ended two years later in 1968, when Onassis left Callas in favor of Jacqueline Kennedy. However, the Onassis family's private secretary, Kiki, writes in her memoir that even while Aristotle was with Jackie, he frequently met with Maria in Paris, where they resumed what had now become a clandestine affair. Callas spent her last years living largely in isolation in Paris and died of a heart attack at age 53 on September 16, 1977. Heart failure is a possible