User blog comment:Annabeth Chase The Wise Girl/Athena Parthenos/@comment-4509745-20121230223253

It's definaty a symbolic way of easing the Greco/Roman tension. Everytime (correct me if I am wrong) the Greeks and Romans reached a peaceful period it was broken by a child of Athena, due to the ache caused by the staue being missing. Putting it back balences the scales so to speak and will open a door to real peace and cooperation.