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Jerome Theisen (30 December 1930 – 11 September 1995) was an American
Benedictine The Benedictines, officially the Order of Saint Benedict (, abbreviated as O.S.B. or OSB), are a mainly contemplative monastic order of the Catholic Church for men and for women who follow the Rule of Saint Benedict. Initiated in 529, th ...
monk A monk (; from , ''monachos'', "single, solitary" via Latin ) is a man who is a member of a religious order and lives in a monastery. A monk usually lives his life in prayer and contemplation. The concept is ancient and can be seen in many reli ...
of
Saint John's Abbey, Collegeville Saint John's Abbey is a Benedictine monastery in Collegeville Township, Minnesota, United States, affiliated with the American-Cassinese Congregation. The abbey was established following the arrival in the area of monks from Saint Vincent Arc ...
, the eighth
abbot Abbot is an ecclesiastical title given to the head of an independent monastery for men in various Western Christian traditions. The name is derived from ''abba'', the Aramaic form of the Hebrew ''ab'', and means "father". The female equivale ...
of Saint John's Abbey, Collegeville, and the seventh Abbot Primate of the Order of St. Benedict and the
Benedictine Confederation The Benedictine Confederation of the Order of Saint Benedict () is the international governing body of the Order of Saint Benedict. Origin The Benedictine Confederation is a union of monastic congregations that nevertheless retain their own aut ...
.


Biography

Jerome Theisen was born in
Loyal, Wisconsin Loyal is a city in Clark County, Wisconsin, United States. The population was 1,261 at the 2010 United States Census, 2010 census. The city is located within the Loyal, Clark County, Wisconsin, Town of Loyal, though it is politically independent. ...
, United States, on 30 December 1930, the ninth of ten children (five boys and five girls). His parents were William and Mae (née Reif) Theisen. He came to Saint John's to initially study Latin in preparation for
seminary A seminary, school of theology, theological college, or divinity school is an educational institution for educating students (sometimes called seminarians) in scripture and theology, generally to prepare them for ordination to serve as cle ...
, but was drawn to the monastic life and entered the abbey making his
religious profession In the Catholic Church, a religious profession is the solemn admission of men or women into consecrated life by means of the pronouncement of religious vows, typically the evangelical counsels. Usage The 1983 Code of Canon Law defines the ter ...
on 11 July 1952. He completed his undergraduate degree in
Philosophy Philosophy ('love of wisdom' in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, Value (ethics and social sciences), value, mind, and language. It is a rational an ...
and was ordained as a
Roman Catholic The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...
priest A priest is a religious leader authorized to perform the sacred rituals of a religion, especially as a mediatory agent between humans and one or more deity, deities. They also have the authority or power to administer religious rites; in parti ...
on 28 July 1957. He completed his
doctoral studies A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of graduate study and original research. The name of the deg ...
in
Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...
at the Pontificio Ateneo Sant'Anselmo in 1966 with his dissertation entitled "''Mass Liturgy and the Council of Trent.''" Theisen returned to America and began an extensive scholarly life writing books and articles, along with giving retreats, workshops, lectures, and serving as a professor at numerous academic institutions. As noted in his obituary: On 22 August 1979 Theisen was elected as the eighth abbot of Saint John's Abbey receiving his abbatial blessing on 19 October 1979. He served in the role for the next thirteen years until he was elected as the seventh Abbot Primate of the
Benedictine Confederation The Benedictine Confederation of the Order of Saint Benedict () is the international governing body of the Order of Saint Benedict. Origin The Benedictine Confederation is a union of monastic congregations that nevertheless retain their own aut ...
and Order of St. Benedict on 19 September 1992. As Abbot Primate he resided in Rome, Italy, overseeing
Sant'Anselmo all'Aventino Sant'Anselmo all'Aventino () is a complex located on the Piazza Knights Hospitaller, Cavalieri di Malta Square on the Aventine Hill in Rome's Ripa (rione of Rome), Ripa rione and overseen by the Benedictine Confederation and the Abbot Primate. The ...
. During his abbatial years at Saint John's and later as Abbot Primate for a short three years before his death, he travelled quite extensively to represent the Benedictine community. As his home abbey of Saint John's had to address the growing realization of prior sexual abuse by monks of their monastery, Theisen would establish in 1991 the "''Interfaith Sexual Trauma Institute.''" As Abbot Primate he would be remembered especially for his role in convoking in Rome an international gathering of women monastics in September 1992. After only three years into his six-year term as Abbot Primate, Theisen died of a heart attack on 11 September 1995 and is buried at Saint John's Abbey in Collegeville, Minnesota.


References


External links


Saint John's Abbey
(in English)
The Benedictine Confederation of Congregations of Monasteries of the Order of Saint Benedict
(in Italian and English)
International Atlas of Benedictine Monasteries
(in English)
Pontificio Ateneo Sant'Anselmo
(in Italian and English)
Collegio Sant'Anselmo
(in Italian and English) {{DEFAULTSORT:Thiesen, Jerome 1930 births 1995 deaths 20th-century American male writers 20th-century American non-fiction writers 20th-century American Roman Catholic priests 20th-century American Roman Catholic theologians 20th-century Christian abbots Abbots Primate American Benedictines American male non-fiction writers American religious writers American Roman Catholic writers Benedictine abbots Benedictine scholars Benedictine writers Catholics from Wisconsin College of Saint Benedict and Saint John's University alumni Pontifical Atheneum of St. Anselm alumni