It is 5 p.m., and the church bells in the center of the city begin to toll. Hundreds of commuters stream across the Praca da Se square, passing in front of the headquarters of the largest archdiocese in the nation with the most Catholics in the world.
But over the pealing sounds of the cathedral, many commuters are hearing a very different religious message.
"The world is dominated by sin! Only the Gospel can save you! Only evangelism can save you!" shouts a middle-aged man, gesticulating wildly and increasing volume as he utters each sentence.