After the destruction of the original Citadel, the reapers had given the council races the knowledge to rebuild the station which is now twice the size of the original. Though many changes were made in its construction, there were many things that remained the same. In the center of the Presidium, there's a statue honoring the great Commander Shepard with a memorial wall under the statue which has the names of everyone who had died in the fight against the reapers including Admiral David Anderson.