Members of the Catholic clergy await the start of a Holy Eucharist celebration to be held by Pope Benedict XVI at the Olympic Stadium in Berlin September 22, 2011. Pope Benedict urged the faithful not to leave the Roman Catholic Church on Thursday as he began a four-day visit to Germany, where record numbers have quit the pews in protest against clerical sex abuse of youths. About 100 left-wing deputies planned to boycott the pope's speech to the Bundestag, saying it violates the separation of church and state. REUTERS/Morris Mac Matzen (GERMANY - Tags: RELIGION POLITICS)