Dietrich of Nieheim

Dietrich of Nieheim (Niem or Nyem) (c. 1345 – March 22, 1418), medieval historian, was born at Nieheim, a small town subject to the see of Paderborn.

He became a notary of the papal court of the rota at Avignon, and in 1376 went with the Curia to Rome. Urban VI here took particular notice of him, made him an abbreviator to the papal chancery, and in 1383 took him with him in his visit to Charles III of Naples at Naples, an expedition which led to many unpleasant adventures, from which he escaped in 1385 by leaving the Curia.

In 1387 he is again found among the abbreviators, and in 1395 Pope Boniface IX appointed him to the Prince-Bishopric of Verden. His attempt to take possession of the see, however, met with successful opposition; and he had to resume his work in the chancery, where his name again appears in 1403.

In the meantime he had helped to found a German hospice in Rome, which survives as the Institute dell' Anima, and had begun to write a chronicle, of which only fragments are extant. His chief importance, however, lies in the part he took in the controversies arising out of the Great Schism. He accompanied Gregory XII to Lucca in May 1408, and, having in vain tried to make the pope listen to counsels of moderation, he joined the Roman and Avignonese cardinals at Pisa. He adhered to the pope elected by the council of Pisa (Alexander V) and to his successor, Antipope Pope John XXIII resuming his place at the Curia. In view of the increasing confusion in the Church, however, he became one of the most ardent advocates of the appeal to a general council. He was present at the council of Constance as adviser to the German "nation." He died at Maastricht on 22 March 1418.

Niem wrote about events in which he either had an intimate personal share or of which he was in an excellent position to obtain accurate information. His most important works are the Nemus unionis and the De schismate. Of these the first, compiled at Lucca after the breach with Gregory XII, is a collection of documents which had fallen into his hands during the negotiations for union: papal pronouncements, pamphlets, letters written and received by limself, and the like. The De schismate libri III, completed on May 25, 1410, describes the history of events since 1376 as Niem himself had seen them. It was continued in the Historia de vita Johannis XXIII.

Other works are:

• De bono regimine Rom. pontificis, dedicated to the new [anti-]pope (John XXIII)
• De modis uniendiae reformandi ecclesiam and De difficultate reformationis in concilia universali, advocating the convocation of a council, to which the pope is to bow
• Contra dampnatos Wiclivitas Pragae, against the Hussites
• Jura ad privilegia imperil, a glorification of the empire in view of the convocation of the council of Constance
• Avisamenta pelcherrima de unions et reformatione membrorum et capitis fienda, a programme of church reform based on his experiences of the evils of the papal system.

A passage from Dietrich of Nieheim's De schismate libri III is used as an epigram at the beginning of the second chapter of Arthur Koestler's novel, Darkness at Noon:

When the existence of the Church is threatened, she is released from the commandments of morality. With unity as the end, the use of every means is sanctified, even deceit, treachery, violence, usury, prison, and death. Because order serves the good of the community, the individual must be sacrificed for the common good.

For bibliography see

• Friedrich Wilhelm Bautz (1975). "Dietrich von Niem (Nieheim)". In Bautz, Friedrich Wilhelm (ed.). Biographisch-Bibliographisches Kirchenlexikon (BBKL) (in German). Vol. 1. Hamm: Bautz. cols. 1299–1300. ISBN 3-88309-013-1.
•  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press. {{cite encyclopedia}}: Missing or empty |title= (help)
• Georg Erler, Dietrich von Nieheim (Theodoricus de Nyem): sein Leben und seine Schriften, Leipzig: Dürr, 1887 and reprint: Aalen: Scientia-Verlag, 1977. ISBN 3511008743
• Hermann Heimpel (1957), "Dietrich von Nieheim", Neue Deutsche Biographie (in German), vol. 3, Berlin: Duncker & Humblot, pp. 691–692
• Theodor Lindner (1886), "Dietrich von Nieheim", Allgemeine Deutsche Biographie (in German), vol. 23, Leipzig: Duncker & Humblot, pp. 671–673
• August Potthast, Bibliotheca historica medii aevi (2nd ed., Berlin, 1896), p. 1051, s.v. "Theodoricus de Niem"

• Catholic Encyclopedia article