I recently came across a recording of Bach's Partita for Violin No. 2, the fifth movement (the Chaconne), and upon researching it further, I learnt that it is often praised as a very important composition.
Yehudi Menuhin called the Chaconne "the greatest structure for solo violin that exists".
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." He played the piece busking in L'Enfant Plaza for The Washington Post.
However, while listening to it myself, sure, I'd agree that the intense double-stopping and polyphonic nature of the piece would certainly deserve some praise (more so for the performer than the composer, I'd imagine), I fail to see why the composition is so highly regarded.
Could someone shed some light on this?