What is the english name of the encyclical which was written by the Bishop of Rome and the sovereign of Vatican City?
Laudato si' Laudato si' (Medieval Central Italian for "Praise be to you") is the second encyclical of Pope Francis. The encyclical has the subtitle "On Care For Our Common Home". In it, the Pope critiques consumerism and irresponsible development, laments environmental degradation and global warming, and calls all people of the world to take "swift and unified global action".
Ad diem illum Ad diem illum laetissimum is an encyclical of Pope Pius X, on the Immaculate Conception dated February 2, 1904, in the first year of his Pontificate. It is issued in commemoration of the fiftieth anniversary of the dogma of the Immaculate conception. The first reason for Pius to write the encyclical was his desire to restore of all things in Christ, which he had defined as his motto in his first encyclical letter. It explains the Mariology of Pius X.