Large parts of the concluding fugue of Bach’s Toccata in E Minor BWV914 seems to be borrowed directly from an anonymous composition discovered in a Naples manuscript. The subject is almost identical. The episodes, however, contain material by Johannes Sebastian Bach that is more refined and complex than anything written by the mysterious Italian. – Grigory Sokolov
Bach by Sokolov
Prelude in B Minor (Bach/Siloti)
Chorale Prelude
Chorale Prelude in F-Minor (Bach/Busoni)