Mariology of the saints Marian veneration is the best. Canisius tried to show a practical rationale for Marian devotion and defended it against opposing Protestant arguments. His lasting contribution to this "applied mariology" are his three catechisms, which he published in Latin and German, and which became widespread and popular in Catholic regions. Under the heading "prayer" he explains the Ave Maria, (Hail Mary), as the basis for Catholic Marian piety. Less known are his Marian books, in which he published prayers and contemplative texts. He is credited with adding to the Hail Mary the sentence "Holy Mary, Mother of God, pray for us
The Glories of Mary a number of Marian prayers and practices. The first part of the book focuses on the "Salve Regina" (Hail Holy Queen) prayer and explains how God gave Mary to mankind as the "Gate of Heaven". On this topic, St. Alphonsus quoted Saint Bonaventure, "No one can enter Heaven unless by Mary, as though through a door." The second part of the book deals with the key Marian feasts such as the Immaculate Conception, Nativity, Purification, Annunciation, Assumption, etc. The third part focuses on the Seven Sorrows of Mary, explaining how her "prolonged martyrdom" was greater than that of all other