The dogma of the Immaculate Conception fought back against liberalism, interdenominationalism, the Masonic egalitarian mentality of the French Revolution
To All the faithful who by themselves or with others, in church or at home, with at least contrite heart and devotion, shall make this novena: (1) 300 days indulgence for each of the nine days; (2) a plenary indulgence on one day of the novena or of the eight days following it. (Pius IX, January 5, 1849.)
Note.--The above indulgences may also be gained for making the novena at any other time of the year, and are not attached to any prescribed formula of prayer. The same applies to all other novenas in honor of the Blessed Virgin.
Hail Mary, etc.
Ejaculation: O Mary, conceived without sin, pray for us who have recourse to thee! Indulgence. 100 days, once a day. (Leo XIII, March 25, 1884.)