This piece originally is known as Toccata and Fugue in E Major, BWV 566. However, copies from the 18th century by Johann Tobias Krebs and Johann Peter Kellner have survived as this piece transposed to C Major. In my mind it even sounds better on some historical temperaments plus the low C is more powerful than E. I had a great fun practicing it for a few months and recording it now. Hope you will enjoy it!