Bernard of Clairvaux, O. Cist (1090 – August 20, 1153) was a Frankish abbot and the primary builder of the reforming Cistercian monastic order. After the death of his mother, Bernard sought admission into the Cistercian order. Three years later, he was sent to found a new abbey at an isolated clearing in a glen known as the Val d'Absinthe, about 15 km southeast of Bar-sur-Aube.
Christian of Oliva, Christian of Prussia, (died 1245) was the first Bishop of Prussia. He was a Cistercian. Most but not all authors identify him with Godfrey of Łękno. Before his appointment as bishop, he had been the abbot of the monastery of Łekno near Gniezno. In 1209, Christian was commissioned by Pope Innocent III to be responsible for the Prussian missions between the Rivers Vistula and Neman. He was appointed bishop in 1212.
Pope Lucius III (ca.1100 – November 25, 1185), born Ubaldo, was pope from September 1, 1181 to his death. A native of the independent republic of Lucca, he was born ca. 1100 (1097?) as Ubaldo, son of Orlando. He is commonly referred to as a member of the aristocratic family of Allucingoli, but this is not proven. He had close ties to the Cistercians, but it seems that he never joined this order.
Caesar of Heisterbach, also known as Caesarius of Heisterbach ca. 1180 - ca. 1240, was the prior of the former Cistercian Heisterbach Abbey, in the Siebengebirge near the little town of Oberdollendorf, Germany.
John Hooper, Johan Hoper, (ca. 1495-1500 – 9 February 1555) was an English churchman, Anglican Bishop of Gloucester and Worcester. A Protestant Reformer, he was martyred during the Marian Persecutions.
Adolf Josef Lanz aka Jörg Lanz, who called himself Lanz von Liebenfels (July 19, 1874 - April 22, 1954) was an Austrian publicist and journalist. He was a former monk and the founder of the magazine Ostara, in which he published anti-semitic and völkisch theories.
Aelred (1110 – 12 January 1167) was an English Christian saint and writer. He served as Abbot of Rievaulx from 1147 until his death. His name is also translated as Ailred and, in some traditions, Eilred.
Jacob of Juterbogk (c. 1381 - April 30, 1465), was a German monk and theologian. Benedict Stolzenhagen, known in religion as Jacob, was born at Jüterbog in Brandenburg of poor peasant stock. He became a Cistercian at the monastery of Paradiz in Poland, and was, sent by the abbot to the university of Kraków, where he became master in philosophy and doctor of theology. He returned to his monastery, of which he became abbot.
Adam of Ebrach (late 11th century - 23 November 1161) was the first abbot of Ebrach Abbey in the area of Bamberg, Bavaria, Germany. Adam, originating from the parish of Cologne, is first recorded when entering the Cistercian monastery of Morimond Abbey in Burgundy. In 1126 he led twelve monks to Franconia to settle the monastery of Ebrach, newly founded by king Conrad III, his wife Gertrud and various nobles.
Waltheof (also Waldef or Waldeve; c. 1095–1159) was a 12th century English abbot and saint. He was the son of Simon I of St Liz, 1st Earl of Northampton and Maud, 2nd Countess of Huntingdon, thus stepson to David I of Scotland, and the grandson of Waltheof, Earl of Northampton. As a younger son in the world of Norman succession laws, Waltheof chose a career in the church. Between 1128 and 1131 he entered Nostell Priory to become an Augustinian canon.
Blessed Wincenty Kadłubek (1161 – March 8, 1223), also known as Vincent Kadlubek, Vincent Kadlubo, Vincent Kadlubko, Vincent of Kraków, Master Vincentius, was a thirteenth century Bishop of Cracow and historian of Poland.
Stefan (before 1143 - July 18, 1185) was created the first Archbishop of Uppsala in Sweden in the year 1164, a post he held until his death. Stefan was a Cistercian monk from Alvastra monastery (of which he was one of the founders in 1143). His origin is not known, but it is believed that he was originally from England or Germany because many monks from the monastery were from those countries and because his name was rather uncommon in Sweden at that time.
Adam of Perseigne (c. 1145–1221) was a French Cistercian, Abbot of the monastery of Perseigne in the Diocese of Mans. Adam was born around 1145 into a serf, or peasant, family. He is thought to have been first a canon regular, later a Benedictine of Marmoutier and then a Cistercian. In 1188, he became Abbot of Perseigne, wither his reputation for holiness and wisdom drew the great personages of his time to seek his counsel.
Paolo Silvio Boccone (24 April 1633 – 22 December 1704) was an Italian botanist from Sicily, whose interest in plants had been sparked by a visit to the botanical gardens (l'Orto Botanico) founded in Messina by the Roman doctor Pietro Castelli, who became his instructor.
Stanisław Samostrzelnik (c. 1490–1541) was a Polish Renaissance painter and Cistercian monk from Kraków. He was the first Polish painter known by name who painted in the Renaissance style. There are many frescos by him in the churches of southern Poland. Possibly his most well known work is that of the Portrait of Piotr Tomicki, which, following a $12,000 donation, recently had restoration work carried out.
Robert Reid (died 1558) was abbot of Kinloss, commendator-prior of Beauly, and bishop of Orkney. He was one of the greatest of the bishops of St Magnus Cathedral, Kirkwall, Scotland, and his legacy was the founding of the University of Edinburgh. Robert Reid was Sub-Dean at Elgin Cathedral before becoming the abbot of the Cistercian monastery of Kinloss Abbey at Kinloss, Moray; he also held the priory of Beauly in commendam.
Baldwin of Exeter (c. 1125 – 19 November 1190) was Archbishop of Canterbury between 1185 and 1190. Son of a clergyman, he studied both canon law and theology at Bologna and was tutor to Pope Eugenius III's nephew before returning to England to serve successive bishops of Exeter. After becoming a Cistercian monk, he was named abbot of his monastery before being elected to the episcopate at Worcester. Before becoming a bishop, he wrote theological works and sermons, some of which survive.
Cadwgan also known as Cadwgan of Llandyfái (died 11 April 1241) was a Welsh cleric who was Bishop of Bangor from 1215 to 1236. According to Giraldus Cambrensis, Cadwgan was the son of an Irish priest and a Welsh mother. The annals state that he was the son of a priest famous for the eloquence of his Welsh preaching. He was Abbot of the Cistercian Abbey of Whitland. Cadwgan is sometimes referred to as Martin, which may have been his monastic name.