This describes
the photo from wednesday. It's a pillar made of books (most of them are the political books from the communist era, I think). And it has mirrors inside: one at the top, one on the bottom. So when you look inside it seems to be infinite deep. It is strange when you look there for the first time. People are usually scared to bend over because they don't want to fall :) But when you bend over enough, you'll see yourself in the mirror.