Maria Callas (1923-1977) was an American-born Greek soprano who is widely regarded as one of the greatest opera singers of all time. She was renowned for her powerful voice, her dramatic intensity, and her ability to convey a wide range of emotions. She was also known for her tempestuous personal life, which included a scandalous affair with Aristotle Onassis. Callas's career was cut short by a vocal decline in the late 1950s, but she remains an iconic figure in the world of opera.