Maria Callas was a renowned Greek-American opera singer, often regarded as one of the greatest sopranos of the 20th century. She was known for her powerful and emotive voice, as well as her dramatic interpretations of opera roles. Callas was particularly celebrated for her performances in the works of Italian composer Giuseppe Verdi and the operas of Vincenzo Bellini and Gaetano Donizetti. Her career was marked by both critical acclaim and personal turmoil, and she remains an iconic figure in the world of opera.