 Complete the following phrase:  A Richter magnitude 6.3 earthquake on 22 February 2011 caused considerable damage to the cathedral. The Cathedral administrator, Monsignor Charles Dren, said that engineers had indicated that it was unlikely the building could be saved. The two bell towers at the front of the building collapsed, bringing much of the front façade down with them, with large blocks of masonry destroying vehicles in front of the building. There was also major cracking evident around the cathedrals main dome. Stained glass windows, which had survived the 