Two musical pieces written by Johann Sebastian Bach were recently performed for the first time ever, more than 300 years after they were composed.

Both written for the organ, they are believed to date from the great composer’s very early career, when he worked as a organ tutor in Thuringia.

Germany’s Culture Minister Wolfram Weimer called the discovery of the two pieces a “great moment for the world of music.”

Both pieces were unsigned and undated when they were found in the 1990s by Mr. Peter Wollny, a Belgian Bach researcher working at the Royal Library in Brussels. Entitled Chaconne in D minor and Chaconne in G minor, Wollny wasn’t sure who had written them, but suspected they might have been Bach’s.

That hunch needed 30 years to be realized, as the archivist, now director of the Ba

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