Joseph Ratzinger, the future Pope Benedict XVI, gave a series of lectures at the University of Tübingen in 1968, which became the bestseller Introduction to Christianity – a profound interpretation of the apostolic faith in the crisis of the modern era.
John Mary Vianney (1786-1859), who would go down in history as the parish priest of Ars, lived and worked during the great French Revolution, difficult events especially for the Church.