which he particularly favoured. The chorales on "An Wasserflüssen Babylon" were all of that type: a concise four-part fugue followed by a 3-part setting accompanying a slow cantus firmus in the soprano or bass; or a 4-part setting with the soprano in the cantus firmus. The 2004 catalogue of Pachelbel's works, compiled posthumously by Jean M. Perreault, lists four chorale preludes based on the "An Wasserflüssen Babylon." Another organ work by Pachelbel based on the hymn was discovered in 2006 in the same manuscript as Reincken's chorale fantasia. Its first recording, a performance by Jean-Claude Zehnder, was issued in 2007. 18th century The young Johann Sebastian Bach was aware of Reincken's reputation and owned a copy of the chorale fantasia when he studied with Georg Böhm in 1700. Bach's copy, in organ tablature, was rediscovered in 2005 at the Herzogin Anna Amalia Bibliothek in Weimar by Michael Maul and Peter Wollny, and as such is believed to be one of Bach's oldest extant manuscripts. In a posthumous article, wrote that, "Whether, however, Bach is the copyist of the source is not determined with certainty from the research conducted to date." Reincken, whose celebrated chorale fantasia had already acquired a reputation, repaid the debt to Bach. In there is a description of a concert in 1720, when Bach extemporised for "almost half an hour" on An Wasserflüssen Babylon at the organ loft of St. Catherine's Church, Hamburg. As recorded in his obituary, Bach "travelled to Hamburg, and allowed himself, in front of the Magistrat and many sophisticated people of the City, to be listened to for more than two hours on the beautiful organ at the Catherinenkirche with general amazement. The old organist at this church, Johann Adam Reincken, who then was almost a hundred years old, listened to him with special pleasure and particularly complimented him on the chorale "An Wasserflüssen Babylon" which our Bach treated and improvised for almost half an hour in a different way, very spaciously, as the brave ones among the Hamburg organists formerly used to play during the Saturday vespers. Reincken complimented him as follows: "I thought this kind of art had died out but I see that it is still alive in you"." Bach composed his chorale prelude "An Wasserflüssen Babylon," BWV 653, as the third chorale of the Great Eighteen Chorale Preludes It was written in Leipzig, around 1739–1742, in his full maturity.