Dieterich Buxtehude was a Danish organist and composer of the Baroque period, whose works are typical of the North German organ school. As a composer who worked in various vocal and instrumental idioms, Buxtehude's style greatly influenced other composers, such as Johann Sebastian Bach and George Frideric Handel. Buxtehude is considered one of the most important composers of the 17th century.

An organist is a musician who plays any type of organ. An organist may play solo organ works, play with an ensemble or orchestra, or accompany one or more singers or instrumental soloists. In addition, an organist may accompany congregational hymn-singing and play liturgical music.