Well, that's part of the challenge: accounting for man's natural curiosity. The other problem is language drift; people several centuries from now won't be speaking the exact same languages as us, so how do you communicate the danger to them in a way they won't interpret as "a curse shall befall any who enter here" and then promptly dismiss?
Yes, the problem is quite fun to look at. The half life of radioactive elements is very long: I know people who work in ancient text statistical deciphering (when we do not know the language we assume that the process that generated the text we are trying to decipher was not random (Doh!) and are trying to find a number of lexical and morphological features by clustering and find a functional model that can generate the texts ) and even these relatively modern texts (humans as a species started writing around 4000 BC, which is like seconds ago, in geological scale) are practically undecipherable.
Tevinter Imperium was founded about 2000 years ago, Arlathan 8439 years ago.
So yep - This place is not a place of honor isn't going to work. 