Show st peters square st peters square extends beyond bayona the thick walls which mark the boundaries of the tiny sovereign state rising from the surrounding section of df rome says a national geographic S society clety 0 bulletin these walls end on one side of the square at the barracks of the swiss guards picturesque tur esque part of the vaticano Vati cans protective force on the other side of the square the walls continue partly enclosing a group of buildings and grounds including st peters museum oratory and chapel and the girls and boys playgrounds |