Dieterich Buxtehude (, also Dietrich; Danish Diderich, equivalent to the modern Diderik) (c. 1637 to 1639 – 9 May 1707) was a German-Danish organist and composer of the Baroque period. His organ works represent a central part of the standard organ repertoire and are frequently performed at recitals and in church services. He composed in a wide variety of vocal and instrumental idioms, and his style strongly influenced many composers, including Johann Sebastian Bach. Today, Buxtehude is considered one of the most important German composers of the mid-Baroque.