Pachelbel's Canon is an accompanied canon by the German Baroque composer Johann Pachelbel in his Canon and Gigue for 3 violins and basso continuo. It is sometimes called Canon and Gigue in D or Canon in D. Neither the date nor the circumstances of its composition are known, and the oldest surviving manuscript copy of the piece dates from the 19th century.
The above text from the Wikipedia article "Pachelbel's Canon" text is available under CC BY-SA 3.0.