Category
page 111th-century Christian abbots
Anselm of Canterbury
11th‑century Benedictine monk, Archbishop of Canterbury, philosopher and theologian

Victor III
head of the Catholic Church and ruler of the Papal States from 1086 to 1087
Stephen IX
pope
Symeon the New Theologian
Christian saint, monk, and theologian

Romuald
Romuald (; 951 – traditionally 19 June, c. 1025/27 AD) was the founder of the Camaldolese order and a major figure in the eleventh-century "Renaissance of eremitical asceticism". Romuald spent about 30 years traversing Italy, founding and reforming monasteries and hermitages.

Lanfranc
Lanfranc (1005 1010 – 24 May 1089) was an Italian-born English churchman, monk and scholar. Born in Italy, he moved to Normandy to become a Benedictine monk at Bec. He served successively as prior of Bec Abbey and abbot of St Stephen's Abbey in Caen, Normandy and then as Archbishop of Canterbury in England, following its conquest by William the Conqueror. He is also variously known as (), (), and (). In his lifetime, he was regarded as the greatest theologian of his generation.
Abbot Oliba
Catalan count, abbot and bishop (c.971-1046)
Ælfric of Eynsham
English abbot and prolific writer in Old English of hagiography, homilies and biblical commentaries (c.955-c.1010)

Humbert of Silva Candida
French cardinal, writer and diplomat
Theodosius of Kyiv
Ukrainian saint
Dominic of Silos
abbot and saint
Ealdred
Abbot of Tavistock; Bishop of Hereford; Bishop of Worcester; Archbishop of York
Niketas Stethatos
Byzantine theologian
John Gualbert
Italian Roman Catholic saint
Constantine Leichoudes
Patriarch of Constantinople

Peter Igneus
Italian Roman Catholic cardinal and saint
William of Hirsau
German abbot and theologian
Barlaam of Pechersk
Eastern Orthodox abbot
Maurus of Pécs
Hungarian Roman Catholic bishop of Pécs from year 1036 until his death around year 1075 and saint
Heriger of Lobbes
Christian abbot, theologian, and historian
Poppo of Stavelot
Abbot of Stavelot
Adelelmus of Burgos
French Roman Catholic saint

Walter of Pontoise
French abbot and saint
Aron
Polish bishop and abbot
Gilbert Crispin
Abbot of Westminster
Ulrich von Eppenstein
Roman Catholic patriarch
Herbert de Losinga
Anglo-Norman Bishop of Thetford and Bishop of Norwich
Siward
Bishop of Rochester; Abbot of Chertsey
Paul of Caen
abbot of Saint Albans Abbey