Two previously unknown organ compositions by Johann Sebastian Bach have been unveiled and performed in Germany for the first time in over three centuries. The pieces, identified as the Chaconne in D minor BWV 1178 and Chaconne in G minor BWV 1179, were discovered by Peter Wollny, a renowned Bach scholar, while cataloging manuscripts at the Royal Library of Belgium in Brussels in 1992. After three decades of meticulous research, Wollny confirmed their authenticity, attributing them to Bach’s early career when he served as an organ teacher in Arnstadt, Thuringia. The compositions were performed at Leipzig’s St. Thomas Church, where Bach is buried and where he worked as a cantor for 27 years. Dutch organist Ton Koopman, who premiered the works, praised their high quality and suitability for smaller organs. Wollny, now director of the Leipzig Bach Archive, highlighted stylistic elements unique to Bach’s early period, further solidifying their attribution. The pieces, believed to have been transcribed by Bach’s pupil Salomon Günther John in 1705, have been added to the official catalogue of Bach’s works. Germany’s Culture Minister Wolfram Weimer hailed the discovery as a monumental moment for the global music community.