In 1956, Pope Pius XII, who had personally known Fr. Rupert Mayer during his time as nuncio in Munich, awarded him the title Servant of God. Under Pope John XXIII, the beatification process was initiated, the results of which were formally accepted by Pope Paul VI in 1971. Under Pope John Paul II, the decree of 'heroic virtue' was issued in 1983. Mayer was beatified by Pope John Paul II on 3 May 1987 in Munich. His feast day is 3 November.