Pius X Ad diem illum EN
Ad diem illum laetissimum
Enciclical on the Immaculate Conception
Pope Pius X
February 2, 1904.
Compilation of magisterial documents; the notices on Popes and the topics are extracted from the “Catholic Software 2.0” CD.


Ad Diem Illum Laetissimum

On the Immaculate Conception

Encyclical of Pope Pius X

February 2, 1904.

To the Patriarchs, Primates, Archbishops, Bishops, and other Ordinaries in Peace and Communion with the Apostolic See.