The passacaglia in d minor of Dietrich Buxtehude (BuxWV 161) »is generally acknowledged as one of his most important works, and was possibly an influence on Bach’s Passacaglia and Fugue in C minor (BWV 582), as well as Brahms’ music.«
There’s an awesome performance by Harald Vogel, playing the historic Arp Schnitger organ of St. Ludgeri, Norden. Sheet music is available through the International Music Score Library Project. However, I was not content with the sheets I found. For example, I wanted to decouple the left hand accompaniment (see bars 103 and 110) from the right hand for better readability, since I play both on different keybeds. Thus I rewrote the score using the excellent Muse Score notation software. My release contains a PDF and the Muse Score source file so anyone can easily taylor the layout to her likings:
Have fun playing!