A woman looks at religious articles at a shop in the Basilica of Guadalupe in Mexico City
A woman looks at religious articles at a shop in the Basilica of Guadalupe in Mexico City February 11, 2013. Pope Benedict stunned the Roman Catholic Church including his closest advisers on Monday when he announced he would stand down in the first papal abdication in 700 years, saying he no longer had the mental and physical strength to run the Church through a period of major crisis. REUTERS/Edgard Garrido (MEXICO - Tags: RELIGION) - RTR3DNM0
World reacts to Pope's resignation
Pope Benedict left the Catholic world in shock after becoming the first pontiff since the Middle Ages to resign his office, saying that failing strength had left him unable to lead the church through a period of relentless change and turmoil.