Chaconne BWV 1004, Partita No. 2 D minor:
https://www.youtube.com/watch?v=g8Fchz5YSSI
This is one beautiful performance that I cannot get out of my head. It is played by Scottish-born, and for many years based in Brazil, Paul Galbraith, with a special instrument, an 8 string guitar that rests on the floor by a metal support, unlike the conventional guitar of six strings.
Violinist Joshua Bell has said the Chaconne is "not just one of the greatest pieces of music ever written, but one of the greatest achievements of any man in history. It's a spiritually powerful piece, emotionally powerful, structurally perfect." (Wikipedia)
Paul plays Chaconne on a slower tempo, but WOW! His sensitivity, and accuracy are outstanding. This instrument has remarkable bass sounds. Truly a sublime work to share.