Symphony No. 16 in C major, K. 128, was the first of three symphonies composed by Wolfgang Amadeus Mozart in May, 1772, when Mozart was sixteen years old. This symphony is one of many written during the period in which Mozart stayed in Salzburg, between two trips to Italy. The autograph of the score is preserved in the Staatsbibliothek Preußischer Kulturbesitz in Berlin.
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