They said there guarded but I don't see any guards posted and fine lets say they are. It was already proven a small riot with a few armed men actually got through. Now any sizeable bandit crew or mercany unit could easily break through and get to both of the runes then and carry the busts away. Also, they are now all in one chamber in the palace at the end of the game remember? So, anyone with stealth (ninjas, ex-nether gate, Zerase, Raven etc..) could get in there and steal the sun rune.
Those who know much suffer much. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
Why can't you be more sincere and earnest?! Like me!
Kyle: Yeah, how's that working out for you again?