Saint Petrus Canisius (8 May 1521 – 21 December 1597) was an important Jesuit who fought against the spread of Protestantism in Germany, Austria, Bohemia and Switzerland. The restoration of the Catholic Church in Germany after the Reformation is attributed to his work. St Peter Canisius was beatified by Blessed Pius IX in the year 1864, and later canonized and declared a Doctor of the Church on 21 May 1925 by Pope Pius XI. His feast day was included in the General Roman Calendar in 1926, for celebration on 27 April. In 1969 it was moved to 21 December, his day of death.