Giacomo Antonio Domenico Michele Secondo Maria Puccini (December 22, 1858 - November 29, 1924) is regarded as one of the great operatic composers of the late 19th and early 20th century. His operas include including Madame Butterfly and La Boheme.
"Nessun dorma" ("None shall sleep") is an aria from the final act of Giacomo Puccini's frequently performed opera Turandot and is one of the best-known tenor arias in all opera. It is sung by Calaf, il principe ignoto (the unknown prince), who falls in love at first sight with the beautiful but cold Princess Turandot. However, any man who wishes to wed Turandot must first answer her three riddles; if he fails, he will be beheaded. In the aria, Calaf expresses his triumphant assurance that he will win the princess.