From Catholic Encyclopedia 1913:
(Kannees, Kanys, probably also De Hondt).
Born at Nimwegen in the Netherlands, 8 May, 1521; died in Fribourg, 21 November, 1597. His father was the wealthy burgomaster, Jacob Canisius; his mother, Ægidia van Houweningen, died shortly after Peter's birth. In 1536 Peter was sent to Cologne, where he studied arts, civil law, and theology at the university; he spent a part of 1539 at the University of Louvain, and in 1540 received the degree of Master of Arts at Cologne. Nicolaus van Esche was his spiritual adviser, and he was on terms of friendship with such staunch Catholics as Georg of Skodborg (the expelled Archbishop of Lund), Johann Gropper (canon of the cathedral), Eberhard Billick (the Carmelite monk), Justus Lanspergius, and other Carthusian monks. Although his father desired him to marry a wealthy young woman, on 25 February, 1540 he pledged himself to celibacy. In 1543 he visited Peter Faber and, having made the "Spiritual Exercises" under his direction, was admitted into the Society of Jesus at Mainz, on 8 May. With the help of Leonhard Kessel and others, Canisius, labouring under great difficulties, founded at Cologne the first German house of the order; at the same time he preached in the city and vicinity, and debated and taught in the university. In 1546 he was admitted to the priesthood, and soon afterwards was sent by the clergy and university to obtain assistance from Emperor Charles V, the nuncio, and the clergy of Liège against the apostate Archbishop, Hermann von Wied, who had attempted to pervert the diocese. In 1547, as the theologian of Cardinal Otto Truchsess von Waldburg, Bishop of Augsburg, he participated in the general ecclesiastical council (which sat first at Trent and then at Bologna), and spoke twice in the congregation of the theologians. After this he spent several months under the direction of Ignatius in Rome. In 1548 he taught rhetoric at Messina, Sicily, preaching in Italian and Latin. At this time Duke William IV of Bavaria requested Paul III to send him some professors from the Society of Jesus for the University of Ingolstadt; Canisius was among those selected.
On 7 September, 1549, he made his solemn profession as Jesuit at Rome, in the presence of the founder of the order. On his journey northward he received, at Bologna, the degree of doctor of theology. On 13 November, accompanied by Fathers Jaius and Salmeron, he reached Ingolstadt, where he taught theology, catechized, and preached. In 1550 he was elected rector of the university, and in 1552 was sent by Ignatius to the new college in Vienna; there he also taught theology in the university, preached at the Cathedral of St. Stephen, and at the court of Ferdinand I, and was confessor at the hospital and prison. During Lent, 1553 he visited many abandoned parishes in Lower Austria, preaching and administering the sacraments. The king's eldest son (later Maximilian II) had appointed to the office of court preacher, Phauser, a married priest, who preached the Lutheran doctrine. Canisius warned Ferdinand I, verbally and in writing, and opposed Phauser in public disputations. Maximilian was obliged to dismiss Phauser and, on this account, the rest of his life he harboured a grudge against Canisius. Ferdinand three times offered him the Bishopric of Vienna, but he refused. In 1557 Julius III appointed him administrator of the bishopric for one year, but Canisius succeeded in ridding himself of this burden (cf. N. Paulus in "Zeitschrift für katholische Theologie", XXII, 742-8). In 1555 he was present at the Diet of Augsburg with Ferdinand, and in 1555-56 he preached in the cathedral of Prague. After long negotiations and preparations he was able to open Jesuit colleges at Ingolstadt and Prague. In the same year Ignatius appointed him first provincial superior of Upper Germany (Swabia, Bavaria, Bohemia, Hungary, Lower and Upper Austria). During the winter of 1556-57 he acted as adviser to the King of the Romans at the Diet of Ratisbon and delivered many sermons in the cathedral. By the appointment of the Catholic princes and the order of the pope he took part in the religious discussions at Worms. As champion of the Catholics he repeatedly spoke in opposition to Melanchthon. The fact that the Protestants disagreed among themselves and were obliged to leave the field was due in a great measure to Canisius. He also preached in the cathedral of Worms.
During Advent and Christmas he visited the Bishop of Strasburg at Zabern, started negotiations for the building of a Jesuit college there, preached, explained the catechism to the children, and heard their confessions. He also preached in the cathedral of Strasburg and strengthened the Catholics of Alsace and Freiburg in their faith. Ferdinand, on his way to Frankfort to be proclaimed emperor, met him at Nuremburg and confided his troubles to him. Then Duke Albert V of Bavaria secured his services; at Straubing the pastors and preachers had fled, after having persuaded the people to turn from the Catholic faith. Canisius remained in the town for six weeks, preaching three or four times a day, and by his gentleness he undid much harm. From Straubing he was called to Rome to be present at the First General Congregation of his order, but before its close Paul IV sent him with the nuncio Mentuati to Poland to the imperial Diet of Pieterkow; at Cracow he addressed the clergy and members of the university. In the year 1559 he was summoned by the emperor to be present at the Diet of Augsburg. There, at the urgent request of the chapter, he became preacher at the cathedral and held this position until 1566. His manuscripts show the care with which he wrote his sermons. In a series of sermons he treats of the end of man, of the Decalogue, the Mass, the prophecies of Jonas; at the same time he rarely omitted to expound the Gospel of the day; he spoke in keeping with the spirit of the age, explained the justification of man, Christian liberty, the proper way of interpreting the Scriptures, defended the worship of saints, the ceremonies of the Church, religious vows, indulgences. urged obedience to the Church authorities, confession, communion, fasting, and almsgiving; he censured the faults of the clergy, at times perhaps too sharply, as he felt that they were public and that he must avoid demanding reformation from the laity only. Against the influence of evil spirits he recommended the means of defence which had been in use in the Church during the first centuries-lively faith, prayer, ecclesiastical benedictions, and acts of penance. From 1561-62 he preached about two hundred and ten sermons, besides giving retreats and teaching catechism. In the cathedral, his confessional and the altar at which he said Mass were surrounded by crowds, and alms were placed on the altar. The envy of some of the cathedral clergy was aroused, and Canisius and his companions were accused of usurping the parochial rights. The pope and bishop favoured the Jesuits, but the majority of the chapter opposed them. Canisius was obliged to sign an agreement according to which he retained the pulpit but gave up the right of administering the sacraments in the cathedral.
In 1559 he opened a college in Munich; in 1562 he appeared at Trent as papal theologian. The council was discussing the question whether communion should be administered under both forms to those of the laity who asked for it. Lainez, the general of the Society of Jesus, opposed it unconditionally. Canisius held that the cup might be administered to the Bohemians and to some Catholics whose faith was not very firm. After one month he departed from Trent, but he continued to support the work of the Fathers by urging the bishops to appear at the council, by giving expert opinion regarding the Index and other matters, by reports on the state of public opinion, and on newly-published books. In the spring of 1563 he rendered a specially important service to the Church; the emperor had come to Innsbruck (near Trent), and had summoned thither several scholars, including Canisius, as advisers. Some of these men fomented the displeasure of the emperor with the pope and the cardinals who presided over the council. For months Canisius strove to reconcile him with the Curia. He has been blamed unjustly for communicating to his general and to the pope's representatives some of Ferdinand's plans, which otherwise might have ended contrary to the intention of all concerned in the dissolution of the council and in a new national apostasy. The emperor finally granted all the pope's demands and the council was able to proceed and to end peacefully. All Rome praised Canisius, but soon after he lost favour with Ferdinand and was denounced as disloyal; at this time he also changed his views regarding the giving of the cup to the laity (in which the emperor saw a means of relieving all his difficulties), saying that such a concession would only tend to confuse faithful Catholics and to encourage the disobedience of the recalcitrant....
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St. Peter Canisius, Doctor of the Church and priest21-Dec
From Catholic Encyclopedia 1913: