Chaconne, BuxWV 160 -- Dietrich Buxtehude
Chaconne in E minor, BuxWV 160 by Dietrich Buxtehude, Transcribed by Andrew Ennis
This piece was originally composed for organ, but was transcribed for orchestra by Carlos Chavez, and is now a completely different, but beautifully orchestral take on the piece when re-transcribed back to organ.