Encyclical letter of His Holiness Pius XI, by Divine providence, pope ... on reconstructing the social order and perfecting it conformably to the precepts of the gospel, in commemoration of the fortieth anniversary of the encyclical "Rerum novarum."

To our venerable brethren: the patriarchs, primates, archbishops, bishops and other ordinaries, in peace and communion with the Apostolic See, and to all the faithful of the Catholic world on reconstructing the social order and perfecting it conformably to the precepts of the gospel. In commemoration of the fortieth anniversary of the encyclical Rerum Novarum