Newly Discovered Bach Pieces Are the Fruits of Decades of Detective Work NYT | Top Stories Adam Nagourney 20 November 2025 at 07:00 A pair of organ works that scholars believe were written by a teenage Johann Sebastian Bach were premiered in Leipzig this week and added to the composer’s official catalog. © Jens Schlueter/Agence France-Presse, via Bach Archive/AFP Via Getty ImageThe two pieces were premiered by Ton Koopman and given their own numbers in the catalog of Bach’s works: BWV 1178 and BWV 1179.