Photo Gallery: 2012 Ash Wednesday Ceremonies 85/117

A priest marks a cross using ashes on the forehead of a man, to signify repentance, during Ash Wednesday services at the Metropolitan Cathedral in Mexico City, Wednesday Feb. 22, 2012. Ash Wednesday for Christians worldwide ushers in a period of penitence and reflection, known as the season of Lent, that leads up to Easter Sunday. (AP Photo/Eduardo Verdugo)