Pachelbel's Cannon, or Canon in D, by Pachelbel is a piece of music written by Pachelbel.
IT can be obtain from a music store selling Classical Music CDs or off iTunes or from Amazon.
Pachelbels Canon in D is not Christmas music. Perhaps someone has combined this piece with something else, but it wouldn't have been composed by Pachelbel.
One is the Concerto for Two Violins in D Minor by Bach. It is a duet that sounds pretty good.
Pachelbel's Or Canon in D, by Pachelbel.
Youtube provides an extension selection of videos that you can use to learn how to play Canon in D major on the piano. Sheet music can also be found on websites like MakingMusicFun.
That is was composed by Johann Pachelbel and is called the Canon in D.
There are reasonably good keyboard versions of the Canon in D.
Look up "Canon in D major for violins" in a serach engine.
Pachelbel's Canon (Canon in D Major by Johann Pachelbel)
Canon in D is Pachelbel's most famous composition. It was composed in early 1600's. It is paired with a gigue in the same key.
Canon in D
The tone or key would be D.
Some musical bands that incorporated the melody of Pachelbel's Canon in D in their songs include "The Pop Tops" and "Aphrodite's Child." You can learn more about Pachelbel's Canon in D at the Wikipedia.