La Scala is the opera house theatre in Milan was opened on 3rd august 1778,a previous theathre was destroyed by a fire.The premiere performance was 
Antonio Salieri 's Europa riconosciuta.The season traditionally open on the 7th december 
Saint Ambrose 's day,the feast day of Milan's patron saint.All performances must end before midnight.La Scala is famous for the "world premiere opera"(1st production) worldwide known to be the greats classics operas as 
Turandot and 
Madama butterfly by Giacomo Puccini, 
Europa riconosciuta by Antonio Salieri, 
Nabucco and 
Otello by 
Giuseppe Verdi .Enjoy the theater 
video gallery here.Is always considred as one of the main music temples worldwide,for many the 1st as heritage.