Maria Callas, nome d’arte di Anna Maria Cecilia Sophia Kalogeropoulou (greco: Άννα Μαρία Καικιλία Σοφία Καλογεροπούλου; New York, 2 dicembre 1923 – Parigi, 16 settembre 1977), è stata un soprano greco, in possesso della nazionalità statunitense e naturalizzata italiana fino al 1966, quando rinunciò ad entrambe per ottenere quella greca. Nata a New York da genitori greci, Maria Callas studiò ad Atene dal 1939 al 1945, intraprendendo la carriera internazionale dai tardi anni quaranta agli anni sessanta.
Η Μαρία Κάλλας (Μαρία Άννα Σοφία Καικιλία Καλογεροπούλου) (Νέα Υόρκη, 2 Δεκεμβρίου 1923 – Παρίσι 16 Σεπτεμβρίου 1977) υπήρξε κορυφαία υψίφωνος και η πλέον γνωστή παγκοσμίως ντίβα της όπερας.
Maria Callas, Commendatore OMRI (Greek: Μαρία Κάλλας; December 2, 1923 – September 16, 1977), was an American-born Greek soprano and one of the most renowned and influential opera singers of the 20th century. Critics praised her bel canto technique, wide-ranging voice and dramatic interpretations. Her repertoire ranged from classical opera seria to the bel canto operas of Donizetti, Bellini and Rossini and further, to the works of Verdi and Puccini; and, in her early career, to the music dramas of Wagner. Her musical and dramatic talents led to her being hailed as La Divina.
Born in New York City and raised by an overbearing mother, she received her musical education in Greece and established her career in Italy. Forced to deal with the exigencies of wartime poverty and with myopia that left her nearly blind onstage, she endured struggles and scandal over the course of her career. She turned herself from a heavy woman into a svelte and glamorous one after a mid-career weight loss, which might have contributed to her vocal decline and the premature end of her career. The press exulted in publicizing Callas’s allegedly temperamental behavior, her supposed rivalry with Renata Tebaldi and her love affair with Greek shipping tycoon Aristotle Onassis. Although her dramatic life and personal tragedy have often overshadowed Callas the artist in the popular press, her artistic achievements were such that Leonard Bernstein called her “the Bible of opera” and her influence so enduring that, in 2006, Opera News wrote of her: “Nearly thirty years after her death, she’s still the definition of the diva as artist—and still one of classical music’s best-selling vocalists.