Incidentally one of his lute suites is the same as the c minor cello suite. Except I think on lute it's in either a or e minor, I forget now. I don't know whether the cello suite came first or the lute suite though.

But as a violist I found this interesting. I like to play his violin sonatas and partitas but on viola but people have discouraged me from this because it means changing the key and everyone insists that Bach is very deliberate in his choice of key and it's almost blasphemy to think about playing his music in a different key. But the lute/cello suite is a direct contradiction to this.