The two catechisms contained in Volume 9 are perhaps the greatest of the Catholic Reformation period, the work of the great catechist and doctor of the Church, St. PeterCanisius.
After successfully establishing the first Jesuit house in Germany (despite the increasingly heretical teachings of the local archbishop), the emperor Ferdinand I besought Canisius to create a catechism that could serve the needs of both priests and laity, with the same gentle charity and precision that marked all of Canisius