Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Toccata and Fugue in F Major, BWV 540 is an organ work written by J.S. Bach. The toccata is thought to be written after 1714, and the fugue before 1731. It is thought by some that Bach joined together two previously separate pieces to create this work.The toccata starts with a large linear canon (imitation theme, one hand imitating the other) over a pedal point in F major. It is then followed by a pedal solo vamping material from the canon. The canon is reiterated with some variations in the dominant in C major. This time the hands are switched, and the left hand leads the right. This is again followed by a long pedal solo. The two large canon flourishes cover 108 measures of the composition.