Recent research suggests that the song was originally composed by Johann Friedrich Anton Fleischmann.
According to Goretzki/Krickenberg (see sources below), the song "Schlafe mein Prinzchen Schlaf ein", often attributed to Mozart (KV350) or Bernhard Flies, was composed by Fleischmann.
Attribution for the melody has since shifted to either Bernhard Flies or Johann Friedrich Anton Fleischmann.
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