Young Mozart in court-dress. Oil on canvas (early 1763) . Probably by Pietro Antonio Lorenzoni. (Photo by Imagno/Getty Images) [Der junge Wolfgang Amadeus Mozart in Hofkleidung.oel/Lw. 1763 . Gemaelde vermutlich von Pietro Antonio Lorenzoni.]

The piece – referred to as 'Ganz kleine Nachtmusik' –  is believed to have been created while Mozart was in his teens

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