Bach Chaconne in D-minor on Tuba

Yehudi Menuhin called the Chaconne "the greatest structure for solo violin that exists".[4]
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."
Johannes Brahms in a letter to Clara Schumann described the piece, "On one stave, for a small instrument, the man [Bach] writes a whole world of the deepest thoughts and most powerful feelings. If I imagined that I could have created, even conceived the piece, I am quite certain that the excess of excitement and earth-shattering experience would have driven me out of my mind."