Is there another document as important as the Magna Carta which can still be read and understood from the original texts? I can't think of one. Admittedly the one I'm holding is a copy (understandably they don't let just anyone handle the original) and I can't actually read Latin, but we did go on and see it. The writing is small, but perfectly clear.
It was as high and scary as it looks - but well worth it.
Then we went outside!