While many of the most valuable paintings in the world are hanging on the walls of famous museums, there are still some masterpieces on the market that are priceless. Almost.
Most recently, a painting by Dutch modernist Piet Mondrian, composed of red, yellow, and blue squares arranged in a grid-like pattern, was sold for US$47.6 million.
If you're taken aback by such a staggering number, you're not alone. Check out this gallery to see the most expensive paintings ever sold at auction.