Mattarella, Concordat helped religious pluralism in Italy. "After forty years the fundamental principle of correct collaboration in freedom, which represents the soul of the Concordat republican, remains a very current and fruitful trace" President of the Republic, Sergio Mattarella, wrote this in a message on the occasion of the study day promoted by the Bettino Craxi ETS Foundation and the Italian Embassy to the Holy See, close to the 40th anniversary of the signing of the Agreement modifying the Concord at.