(Pope Benedict XVI, left, delivers his blessing, flanked by Grand Master of the Knights of Malta Matthew Festing, doing the sign of the cross, at the end of a mass celebrated by Cardinal Tarcisio Bertone, not pictured, to mark the 900th anniversary of theOrder of the Knights of Malta in St. Peter's Basilica, at the Vatican, Saturday, Feb. 9, 2013. The Knights of Malta, one of the most peculiar organizations in the world, is marking its 900th birthday with a colorful procession through St. Peter's Square,)