 Garrigou-Lagrange also supervised the doctoral research of Maurice Zundel who completed his dissertation in 1927 with a dissertation entitled "L'Influence du nominalisme sur la pensée chrétienne".Perhaps the most famous of his students was the future Pope John Paul II, who was supervised by Garrigou-Lagrange for his doctoral research in the mid-1940s at the "Angelicum", and whose encyclical "Fides et Ratio" is attributed to his training under the learned Dominican.He died on 15 February 1964 in Rome.