Inside a String Instrument

My first impression was that this was the inside of a concert hall. But then I realized it was the inside of a string instrument. I'm not sure if it's a violin, viola, cello, or a bass. 

It takes me back to the days when I used to play the violin. I'd peek inside it and see the paper label inside. I'd look at all the lines, the spacing of the tree rings, marvel at how beautiful the instrument is. 

I had no idea the inside would look this beautiful as well. I think it makes sense that it looks like a concert hall - every time you play the instrument it's like a little concert inside. I think it would be cool to design an actual concert hall to look like this.