Late American-born Greek singer Maria Callas had an estimated net worth of $1 million. Born in New York City, New York in December 1923. She was widely recognized for her soprano voice and as one of the most influential and legendary opera singers of the 20th century. Callas prepared for her career training in Greece before relocating to Italy, and she was dubbed La Divina thanks to her musical and dramatic talents. She was also named “the Bible of opera” and “the definition of the diva as artist” by Leonard Bernstein and Opera News respectively. However, she later suffered vocal decline as she lost much weight in the height of her career during wartime poverty. Callas also got involved in some controversies including a love affair with Aristotle Onassis, a Greek shipping tycoon. During her late life, the singer resided in isolation in Paris, France. At 53 years of age, Maria Callas died on September 16, 1977 from a heart attack.