Article Photos: Pope celebrates last public Mass as pontiff 29/37

Pope Benedict XVI celebrates the Ash Wednesday mass in St. Peter's Basilica at the Vatican, Wednesday, Feb. 13, 2013.  Ash Wednesday marks the beginning of Lent, a solemn period of 40 days of prayer and self-denial leading up to Easter. Pope Benedict XVI told thousands of faithful Wednesday that he was resigning for "the good of the church", an extraordinary scene of a pope explaining himself to his flock that unfolded in his first appearance since dropping the bombshell announcement. (AP Photo/Gregorio Borgia)