I was looking at the album artwork in my iTunes, and I kind of like Gidon Kremer's album artworks.They are mostly very understated but beautiful, like his music. I think for someone so talented, he keeps a low profile. Here are 2 of my favourites:

Silencio, which is a collection of minimalist music with his Kremerata Baltica orchestra. I get goosebumps when I see this picture. Especially if you've heard one of the tracks on the CD; Arvo Part's Tabula Rasa-Ludus (Blank slate-Game)
Hommage a Piazolla, which has music composed by Astor Piazolla (tango). Kremer's music has a lot of improvisations, but they work very well.