Skip to main content

William of Hirsau, Bl.


Reforming abbot; b. Bavaria; d. Abbey of Hirsau, July 4, 1091. He was a child oblate at sankt emmeram in Regensburg. In 1069 he was appointed abbot of the Benedictine Abbey of hirsau, although he refused to take office before the death of his predecessor, Abbot Frederick (1071), who he thought had been unjustly deposed. He received full exemption for his monastery from Pope gregory vii in 1075, and became a zealous supporter of the Hildebrandine cause within the Empire during the investiture struggle.

Between 1076 and 1078 William introduced at Hirsau the practice of professing monastic servants, who were known as fratres exteriores. This practice became widespread and was adopted at Cluny, probably at the end of the century. It marks an important step toward the development in the Benedictine tradition of fratres conversi. Then, in 1079, Pope Gregory's legate Bernard, Abbot of saint-victor in Marseilles, and ulric of zell came to Hirsau and persuaded William to adopt the customs of cluny for his abbey. Abbot hugh of cluny then caused an adaptation of the customs to be made, and thesecombined with customs from Sankt Emmeramwere implemented at Hirsau shortly before William's death, as the Constitutiones Hirsaugienses (Patrologia Latina 150:9271146).

William attracted so many vocations that it became necessary to build a second monastery at Hirsau (108392), and colonies were sent to promote the work of reform in Styria and Carinthia, and at Magdeburg and Erfurt. Over 100 eventually came to observe the Constitutiones Hirsaugienses. William had sought to make Hirsau a learned community, and was himself the author of a work on musical theory (Patrologia Latina 50:114778) and one on astronomy (Patrologia Latina, 150:163942). His life was written by his disciple, Prior Haymo of Hirsau, who died in 1107 (Monumenta Germaniae Historica: Scriptores 12:209225).

Feast: July 5.

Bibliography: p. giseke, Die Hirschauer während des Investiturstreites (Gotha 1883). m. fischer, Studien zur Entstehung der Hirsauer Konstitutionen (Stuttgart 1910). a. brackmann, "Die Anfänge von Hirsau," in Papsttum und Kaisertum (Munich 1926) 215232. m. manitius, Geschichte der lateinischen Literatur des Mittelalters, 3 v. (Munich 191131) 3:220226. p. schmitz, Histoire de l'Ordre de Saint-Benoît, 7 v. (Maredsous, Bel. 194256) 1:202203, 289; 2:250. k. g. fellerer, "Zum Musiktraktat des W. von H.," Festschrift Wilhelm Fischer zum 70. Geb. (Vienna 1956) 6170. m. a. schmidt, Die Religion in Geschichte und Gegenwart, 7 v. (3d ed. Tübingen 195765) 6:1714.

[b. hamilton]

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"William of Hirsau, Bl.." New Catholic Encyclopedia. . 20 Jan. 2019 <>.

"William of Hirsau, Bl.." New Catholic Encyclopedia. . (January 20, 2019).

"William of Hirsau, Bl.." New Catholic Encyclopedia. . Retrieved January 20, 2019 from

Learn more about citation styles

Citation styles gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, cannot guarantee each citation it generates. Therefore, it’s best to use citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

The Chicago Manual of Style

American Psychological Association

  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.