The music video for Bad Romance, Lady Gaga’s major hit, begins with a fugue from The Well-Tempered Clavier by Johann Sebastian Bach. This module explores the relationships between the musical rhetoric of the late Baroque, especially the work of the great organist, and popular music of the 20th and 21st centuries. From direct quotation to distant inspiration, many people have used sound materials associated with the work of Johann Sebastian Bach over the centuries. Some achieved great success and helped bring Bach’s ideas to very wide audiences. Processed and transformed in sound recordings and globally distributed films, these elements form the map of a journey that crosses eras, styles, and geographies.