Mozart was the first composer whose operas have never left the international repertoire, and for many he remains one of the finest vocal composers who ever lived. In a sense, all of his music is vocal music, depending as it does on arresting, singable melodies, but in his great operas, single arias and sacred works, Mozart put his melodic gift to work, revealing the subtleties and expressive potential of a wide range of texts in languages ranging from Italian to Latin to German. In every case, he created masterpieces, from operas such as The Marriage of Figaro, Don Giovanni, and The Magic Flute to the sacred choral motet Ave Verum Corpus and, of course, the unfinished Requiem, his final project.