Cluniac Reforms in the context of Cluny Abbey

The Council of Clermont was a mixed synod of ecclesiastics and laymen of the Catholic Church, called by Pope Urban II and held from 17 to 27 November 1095 at Clermont, Auvergne, at the time part of the Duchy of Aquitaine.

While the council is known today primarily for the speech Pope Urban gave on the final day, it was primarily a synod focused on implementing the Cluniac reforms, enacting decrees and settling local and regional issues. This also included the extension of the excommunication of Philip I of France for his adulterous remarriage to Bertrade of Montfort and a declaration of renewal of the Truce of God, an attempt on the part of the church to reduce feuding among Frankish nobles.

The English Benedictine Reform or Monastic Reform of the English church in the late tenth century was a religious and intellectual movement in the later Anglo-Saxon period. In the mid-tenth century almost all monasteries were staffed by secular clergy, who were often married. The reformers sought to replace them with celibate contemplative monks following the Rule of Saint Benedict. The movement was inspired by Continental monastic reforms, and the leading figures were Dunstan, Archbishop of Canterbury, Æthelwold, Bishop of Winchester, and Oswald, Archbishop of York.

In seventh- and eighth-century England, most monasteries were Benedictine, but in the ninth century learning and monasticism declined severely. Alfred the Great (871–899) deplored the decline and started to reverse it. The court of Æthelstan (924–939), the first king of the whole of England, was cosmopolitan, and future reformers such as Dunstan and Æthelwold learned from Continental exponents of Benedictine monasticism. The English movement became dominant under King Edgar (959–975), who supported the expulsion of secular clergy from monasteries and cathedral chapters, and their replacement by monks. The reformers had close relations with the Crown, furthering its interests and depending on its support. The movement was confined to southern England and the Midlands, as the Crown was not strong enough in northern England to confiscate property from local elites there to establish Benedictine foundations. The movement declined after the deaths of its leading exponents at the end of the tenth century.

Lambert of Guînes (died 16 May 1115) was the bishop of Arras (1094–1115). He was a major regional player and an active proponent of the Cluniac reform movement.

The reform of a religious order is the return of the order from a mitigated or relaxed observance to the rigour of its primitive rule. Example include the Cluniac Reforms and the English Benedictine Reform.

The Abbey of Monte Cassino (today usually spelled Montecassino) is a Benedictine monastery on a rocky hill about 130 kilometres (80 mi) southeast of Rome, in the Latin Valley. Located on the site of the ancient Roman town of Casinum, it is the first house of the Benedictine Order, having been established by Benedict of Nursia himself around 529. It was for the community of Monte Cassino that the Rule of Saint Benedict was composed.

The first monastery on Monte Cassino was sacked by the invading Lombards around 570 and abandoned. Of the first monastery almost nothing is known. The second monastery was established by Petronax of Brescia around 718, at the suggestion of Pope Gregory II and with the support of the Lombard Duke Romuald II of Benevento. It was directly subject to the pope and many monasteries in Italy were under its authority. In 883, the monastery was sacked by Saracens and abandoned again. The community of monks resided first at Teano and then from 914 at Capua before the monastery was rebuilt in 949. During the period of exile, the Cluniac Reforms were introduced into the community.

Montacute is a village and civil parish in Somerset, England, 4 miles (6.4 km) west of Yeovil. The village has a population of 831 (2011 census). The name Montacute is thought by some to derive from the Latin "Mons Acutus", referring to the conically acute St Michael's Hill dominating the village to the west. An alternative view is that it is named after Drogo de Montagu, whose family originated from Montaigu-les-Bois, in the arrondissement of Coutances. Robert, Count of Mortain held Montacute after 1066, and Drogo was a close associate of his.

The village is built almost entirely of the local hamstone. From the 15th century until the beginning of the 20th century it formed the heart of the estate of the Phelips family of Montacute House. The village has a fine medieval church, and was the site of a Cluniac priory, the gatehouse of which is now a private house.

Odilo of Cluny (c. 962 – 1 January 1049) was the 5th Benedictine Abbot of Cluny, succeeding Mayeul and holding the post for around 54 years. During his tenure Cluny became the most important monastery in western Europe. Odilo actively worked to reform the monastic practices not only at Cluny, but at other Benedictine houses. He also promoted the Truce of God whereby military hostilities were temporarily suspended at certain times for ostensibly religious reasons. Odilo encouraged the formal practice of personal consecration to Mary. He established All Souls' Day (on 2 November) in Cluny and its monasteries as the annual commemoration to pray for all the faithful departed. The practice was soon adopted throughout the whole Western church. He was lifelong friends with William of Dijon, another Cluniac abbot and reformer.