Armand Jean Le Bouthillier Rancé

Armand Jean le Bouthillier de Rancé, OCSO (9 January 1626, Paris27 October 1700, Soligny-la-Trappe) was a French abbot of La Trappe Abbey, a controversialist author,

Armand dedicated himself to ecclesiastical service, in order to preserve in the family the former numerous benefices. At ten, he became the commendatory abbot of the Cistercian abbey of La Trappe and two other abbeys, prior of two priories, and canon of Notre-Dame de Paris, which gave him a revenue of about 15,000 livres. At twelve he published a translation of Anacreon with Greek notes. He attended the College d'Harcourt in Paris and went through his course of theological studies with great distinction. In 1651, he was ordained a priest by his uncle Victor Le Bouthillier and embarked on a career as a court abbot. The manner of his life was worldly in the extreme.

In 1652 his father died, leaving him a further increase in estate. At the age of twenty-six he was thus left with practically unlimited wealth. He divided his time between preaching and other priestly obligations, and feasting and the pleasures of fox hunting. He obtained his doctorate in theology in 1654. His uncle, who wanted him as coadjutor bishop, made him archdeacon, and caused him to be elected deputy of the second order to the General Assembly of the French Clergy in 1655. He was also appointed First Almoner to Gaston, Duke of Orléans, in 1656.

He retired to his abbey, of which he became regular abbot in 1664 and introduced an austere reform. He wrote spiritual works and polemical pamphlets. An important controversy ensued when he engaged in a polemic with Jean Mabillon about how much monks were to study, which according to de Rancé was very little.

His penitential mode of life made him many enemies, and caused him to be accused of Jansenism. Indeed, he had ties to Port-Royal, a leading center of Jansenism. He did, however, sign the Formula (against Jansenism). He remained "always a figure of controversy." The practices that de Rancé instituted in La Trappe did, however, spread to some Cistercian monasteries, mainly in France. His influence remained minor until the nineteenth century, when the French monasteries devoted to his ideals grew and created new foundations abroad. They called themselves "Trappist" in reference to La Trappe, the source and origin of their reforms. In 1892, with the approval of Pope Leo XIII, the various Trappist congregations left the Cistercian Order and formed the Trappist Order, then named the 'Order of Reformed Cistercians of Our Lady of La Trappe'.

A biography of his life, , was the final work of the Romantic writer and politician, François-René de Chateaubriand, published in 1844.