Valerianus Magnus or Valeriano Magni OFMCap (October 11, 1586 – July 20, 1661) was an Italian Capuchin, missionary preacher in Central Europe, philosopher, polemicist and author.

[7] The conversion of the Calvinist theologian Bartholomaeus Nigrinus, who was appointed confidential secretary to Władysław IV, was certainly a result of his influence, and it strengthened the Catholic party in Poland.

[8] Władysław IV solicited a cardinal’s hat for Magni, but the opposition of the Jesuits prevented his elevation to the cardinalate.

Magni acquired great reputation in the seventeenth century by his polemical writings against the Protestants, and philosophical ones against Aristotelianism.

[1] He is referred to approvingly in the fifteenth of Pascal's Lettres provinciales and one of his Apologetical Letters may be found in the collection entitled Tuba magna, tom.

[9] Cuthbert of Brighton considers Magni "the greatest and most vigorous of the Capuchin scholastic thinkers formed in the Bonaventuran tradition.