Maria Callas (Greek: Μαρία Κάλλας) (1923–1977) was a Greek soprano, considered one of the most renowned opera singers of the 20th century and one of the greatest singer of all time, being often referred to as the greatest. The critics praised her bel canto technique, her far-reaching voice, and her interpretations of deep psychological analysis. These characters had led her to be hailed as La Divina (The Divine Woman), or La Diva Assoluta (The Absolute Diva).