But... what does it MEAN?

The museum in question is the Reina Sofia, the museum that houses the Guernica, among other things. The vast majority of the museum was really sick: tons of Dalí, Picasso, and all those homeboys and honeys. It is still hilariously pretentious though. There really was a giant black square on the wall called "Untitled," and you can bet they paid many thousands of dollars for it. I was with my parents and we got the audio tour, which afforded much comedic value. One exibit, a bookshelf full of wood chips, had an audio clip of the artist describing the piece, which went something like this:

"I was renting a house near my daughter's school, and I brought some books with me to work on. One morning they caught the light in quite a pretty way, and I said 'that's it! there's my subject! books!' I use hard wood; it's less pourous and requires less treatment. I made the wood into timber and I chopped it into pieces. I'm sort of the opposite of a sculptor. While a sculptor uses solder, I use white glue. When I use white glue to attach the pieces of wood together, it feels as though I'm establishing connections between them."