welcome to our 'little' forum here, we call it, the forum. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
to awsner your question.
Nope, you can't were the armor, though IIRC you can have them in your inventory and sell them, but they are not for a quest.
Just "spooking" you out by showing all the dead knight's armor's, of the other's who entered, and never returned.
again, welcome, and hope you enjoy your stay.
Divinity is a very good game <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />