Now new exhibits have been installed at the top, and visitors can once again ride an elevator to look out from the highest point in the nation's capital.
During the restoration, The Associated Press had a look at some of the worst damage from the 500-foot level. Stones were chipped and cracked all the way through in some places. Others had hairline cracks that had to be sealed.
Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.