Puccini -Turandot - Nessun Dorma (None shall sleep) - Placido Domingo

Turandot, Giacomo Puccini's last opera, with libretto by Giuseppe Adami and Renato Simoni, composed in three acts, based on a play by Carlo Gozzi with the adaptation of Friedrich von Schiller. Premiered at the Teatro Alla Scala in Milan under the baton of Arturo Toscanini. The opera was unfinished because the author's death, being completed by Franco Alfano.
Nessun dorma (None shall sleep) is an aria from the final act of Giacomo Puccini's 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 act before this aria, Calaf has correctly answered the three riddles put to all of Princess Turandot's prospective suitors. Nonetheless, she recoils at the thought of marriage to him. Calaf offers her another chance by challenging her to guess his name by dawn. (As he kneels before her, the Nessun dorma theme makes a first appearance, to his words, "Il mio nome non sai!") If she does so, she can execute him; but if she does not, she must marry him. The cruel and emotionally cold princess then decrees that none of her subjects shall sleep that night until his name is discovered. If they fail, all will be killed.
Calaf, the unknown prince sees Turandot, she asks everyone to leave and has a duet with him (this already composed by Franco Alfano) in which she reveals humble. Calaf what is your account name, and the guards arrive; Turandot restore their pride, but at the time of speaking what is the name of Calaf tells her she say that his name is "Love."

English Translation of "Nessun Dorma" (from Internet)

Nobody shall sleep!...
Nobody shall sleep!
Even you, o Princess,
in your cold room,
watch the stars,
that tremble with love and with hope.
But my secret is hidden within me,
my name no one shall know...
No!...No!...
On your mouth I will tell it when the light shines.
And my kiss will dissolve the silence that makes you mine!...
(No one will know his name and we must, alas, die.)
Vanish, o night!
Set, stars! Set, stars!
At dawn, I will win! I will win! I will win!