The nine prayers of Saint Gregory the Great, "The Maremagnum":
Pope Innocent VIII, granted the following indulgences to those who prayed the nine prayers:
Each day: 14,185,149 years of indulgence.
Each Friday: double the amount.
On Holy Friday: 8 Plenary Indulgences.
Let’s give this gift to the blessed souls of Purgatory.It may seem that the indulgences are great and it’s not necessary to pray them often, but they become a fresh breeze in the immensity of Purgatory, and of the great amount of souls which are there. Many people suffer and few pray for them. Pray with tenacity and as frequently as possible.