Ciaccona in E minor - BuxWV 160
Dieterich Buxtehude (1637/39-1707) was a Danish-German 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 composers in Germany of the mid-Baroque.
The three ostinato bass works Buxtehude composed - two chaconnes (BuxWV 159-160) and a passacaglia (BuxWV 161) - not only represent, along with Pachelbel's six organ chaconnes, a shift from the traditional chaconne style, but are also the first truly developed north German contributions to the development of the genre. They are among Buxtehude's best-known works and have influenced numerous composers after him, most notably Bach (whose organ passacaglia is modeled after Buxtehude's) and Johannes Brahms.
The pieces feature numerous connected sections, with many suspensions, changing meters, and even real modulation (in which the ostinato pattern is transposed into another key).
- from Wikipedia
in "Attachments" you can download the free musical score.