Sir John Eliot Gardiner is an English conductor, particularly known for his performances of the works of Johann Sebastian Bach, especially the Bach Cantata Pilgrimage of 2000, performing Bach's church cantatas in liturgical order in churches all over Europe, and New York City with the Monteverdi Choir, and recording them at the locations. He is the author of Music in the Castle of Heaven: A Portrait of Johann Sebastian Bach and presenter of the documentary Bach: A Passionate Life.