JANSSEN, JOHANNES (1820-1891), German historian, was born at Xanten on the loth of April 1829, and was educated as a Roman Catholic at Munster, Louvain, Bonn and Berlin, afterwards becoming a teacher of history at Frankfort-on- theMain. He was ordained priest in 1860; became a member of the Prussian Chamber of Deputies in 1875; and in 1 880 was made domestic prelate to the pope and apostolic pronotary. He died at Frankfort on the 24th of December 1891. Janssen was a stout champion of the Ultramontane party in the Roman Catholic Church. His great work is his Geschichte des deutschen Volkes sett dem Ausgang des Mittelalters (8 vols., Freiburg, 1878- 1 894) . In this book he shows himself very hostile to the Reformation, and attempts to prove that the Protestants were responsible for the general unrest in Germany during the 16th and i?th centuries. The author's partisanship led to some controversy, and Janssen wrote An meine Kriliker (Freiburg, 1882) and Bin zweites Wort an meine Kriliker (Freiburg, 1883) in reply to. the Janssens Geschichle des deutschen Volkes (Munich, 1883) of M. Lenz, and other criticisms.
The Geschichte, which has passed through numerous editions, has been continued and improved by Ludwig Pastor, and the greater part of it has been translated into English by M. A. Mitchell and A. M.
Christie (London, 1896, fol.). Of his other works perhaps the most important are: the editing of Frankfurts Reichskorrespondenz, 1376- 1519 (Freiburg, 1863-1872); and of the Leben, Briefs und tteinere Schriften of his friend J. F. Bohmer (Leipzig, 1868); a monograph, Schiller als Historiker (Freiburg, 1863); and Zeit- und Lebensbilder (Freiburg, 1875).
See L. Pastor, Johannes Janssen (Freiburg, 1893) ; F. Meister, hnnnerung an Johannes Janssen (Frankfort, 1896) ; Schwann, Johannes Janssen und die Geschichte der deutschen Reformation (Munich, 1892).
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)