Henry was born at Hainbuch, near Langenstein in Hesse. He studied at the University of Paris, where he finished a Magister Artium in 1363, and became professor of philosophy this same year. He finished a Theology Doctor degree in 1375 and then became a professor of theology as well. In 1368, on the occasion of the appearance of a comet, which the astrologers of his times claimed to be a sure foreboding of certain future events, he wrote a treatise entitled Quæstio de cometa, in which he refutes the then prevalent astrological beliefs. At the instance of the university he wrote three other treatises on the same subject, completed in 1373. On his scientific work, A. C. Crombie writes When the Western Schismbroke out in 1378, Henry sided with Urban VI against Clement VII, and wrote various treatises in defence of the former. In 1379 he composed "Epistola pacis" in which, under the form of a disputation between an Urbanist and a Clementine, he advocates the suppression of the schism by way of a general council or a compromise. In his Epistola concilii pacis, composed in 1381, and based on a similar work, the Epistola Concordiæ of Conrad of Gelnhausen, he urges still more strongly the necessity of a general council and severely criticises the many abuses that were permitted to go on within the Church. These two treatises of Henry, and the Epistola Concordiæ of Conrad, formed the basis of a discourse delivered by Cardinal Pietro Philargi, the futureAlexander V, at the first session of the Council of Pisa. Henry's Epistola concilii pacis is printed in von der Hardt's Concilium Constantiense, II, 1, 3-60, with the exception of the first and the second chapter, which were afterwards published by the same author in Discrepantia mss. et editionum, 9-11. When in 1382 the French court compelled the professors of the Sorbonne to acknowledge the antipope Clement VII, Henry left the university and spent some time at Eberbach Abbey, a Cistercian monastery near Wiesbaden. A letter which he wrote here to Bishop Eckard of Worms, and which bears the title De scismate was edited by Sommerfeldt in Historisches Jahrbuch, XXX, 46-61. Another letter which he wrote here to the same bishop, on the occasion of the death of the bishop's brother, is entitled De contemptu mundi. A second letter of condolence, written about 1384, was edited by Sommerfeldt in "Hist. Jahrbuch", XXX, 298-307. Following the invitation of Albert III, Duke of Austria, he came to the University of Vienna in 1384, and assisted in the foundation of a theological faculty. Here he spent the remainder of his life, teaching dogmatic theology, exegesis, and Canon law, and writing numerous treatises. In 1384 Heinrich von Langenstein, together with his colleague and friend Heinrich Totting von Oytha, took up teaching and administrative duties at the newly established University of Vienna. He died at Vienna, having refused an episcopal see which was offered him by Urban VI. In 2008 the University of Vienna attached a third memorial plaque to Heinrich von Langenstein and Heinrich Totting in the University Church - St. Stephen's Cathedral, Vienna near the Apostelchoir, acknowledging the two teachers the "founding professors" of the University of Vienna.
Works
Roth ascribes to him seven works on astronomy, eighteen historico-political treatises on the schism, seventeen polemics, fifty ascetical treatises, and twelve epistles, sermons and pamphlets. Among his printed works are:
De contractibus emotionis et venditionis, an important work on the politico-economical views of his times, published among the works of Jean Gerson, IV, 185-224.
