Someone asked about this. Perhaps a DailyRosary/good habit to practice for the 50 days of Easter?
Your title says "She left for all Christians Fifteen Promises to those who recite the Holy Rosary."
Wouldn't that be ALL Catholics? The term Catholic Church was first used by St. Ignatius of Antioch. On his way to martyrdom in Rome he wrote letters to Christians. To the Christians in Smyrna, he wrote, "Where Jesus is there also is the CATHOLIC CHURCH."
Catholic Church HAS been used for all that time. Also, St. Ignatius DIDN'T explain what he meant by that term "Catholic Church," so scholars ASSUME that the term had been in use since, they estimate, the 80's A.D.