Two organ works attributed to Bach have been identified after 30 years of research and performed on the organ after 300 years, in Leipzig, marking an important discovery in classical music.

Two compositions for organ, 'Chaconne in D minor' BWV 1178 and 'Chaconne in G minor' BWV 1179, have recently been attributed to Johann Sebastian Bach, after over 30 years of research. Peter Wollny, the director of the Bach Archives in Leipzig, discovered the manuscripts in 1992 in the Royal Library of Belgium. Although the scores were not signed or dated, Wollny identified Bach's characteristic style, distinct from that of other composers of the time. With the development of a dedicated search portal for Bach, it was confirmed that the pieces were copied around the year 1705 by Salomon Günther John, a student of Bach. The two chaconnes were performed publicly for the first time by the Dutch organist Ton Koopman at the Saint-Thomas Church in Leipzig, a moment considered a 'world sensation' in the music world.