a plaque among the paving stones in st. peter's square in the vatican commemorating the site of the assassination attempt

1981 39aph39 agca ali architecture assassination attempt catholic city cobble commemorating crime date empty history holy inscription italy john jozef karol landmark may mehmet memorial memory number numerals outrage papa paul paving peter peters piazza pietro place plaque pope religion religious rome s saint shot sign site square stone stones tablet text vatican vaticano wojtyla wounded