In 1981, John Paul II was shot by a Turkish assassin in St. Peter's Square. It happened during his Wednesday audience on May 13.
John Paul was injured, but believed that Our Lady of Fatima pushed the bullet away, so that he did not die or suffer more severe trauma. Of course, May 13 is the date that Our Lady first appeared to the shepherd children in 1917.
While in the hospital, he managed to put together a set of Marian catechesis, especially related to the Total Consecration as put forth by St. Louis Marie de Montfort. The Holy Father said that this book changed his life, and that he had to keep re-reading it as it is a book that one must return to in order to more fully comprehend it as one increases in grace and wisdom.
His papal motto Totus Tuus is derived from the saint's works, and he made a recording of a catechetical address for the pilgrims in the square where he ended, "Ego sum Totus Tuus, Maria!"
Here is a recording from the latter years of his papacy.