Rick Rhay
Google
It's very beautiful, and worth going at nearly any price. But the actual price is like €12, and the tour price is like €75. But you have to get your tickets well in advance because the tour companies buy up all the ticket spots, and it's basically scalping, which is really unsavory. But the museum is not motivated to do anything about it, so you're stuck paying a 500% markup for essentially nothing. So get your tickets early so that you don't have to pay the tour guide premium. The tour guide adds almost no value to the experience, so the minute you decide to go (and you definitely should go), get on line and buy your tickets, so you don't get caught in the tour guide markup scalping racket.