Photo Gallery: 2012 Ash Wednesday Ceremonies 18/117

Pope Benedict XVI, second from left framed by Cardinals, walks in a procession with other prelates at the Santa Sabina Basilica for Ash Wednesday prayer service, in Rome, Wednesday Feb. 17 2010. Ash Wednesday marks the beginning of Lent, a solemn period of 40 days of prayer and self-denial leading up to Easter. (AP Photo/Gregorio Borgia)