Mourners file past the body of Pope John Paul II as he lies in state in the Vatican's St. Peter's Basilica. Mourners file past the body of Pope John Paul II as he lies in state in the Vatican's St. Peter's Basilica April 6, 2005. The conclave to elect a successor to Pope John Paul II will start on April 18, when more than 100 cardinals will face the task of replacing one of the giants of the 20th century, the Vatican announced on Wednesday. REUTERS/POOL/Patrick Hertzog