Centering prayer is a popular method of contemplative prayer or Christian meditation, placing a strong emphasis on interior silence. Though most authors trace its roots to the contemplative prayer of the Desert Fathers of early Christian monasticism, to the Lectio Divina tradition of Benedictine monasticism, and to works like The Cloud of Unknowing and the writings of St. Teresa of Avila and St. John of the Cross, its origins as part of the "Centering Prayer" movement in modern Catholicism and Christianity can be traced to several books published by three Trappist monks of St. Joseph's Abbey in Spencer, Massachusetts in the 1970s: Fr. William Meninger, Fr. M. Basil Pennington and Abbot Thomas Keating.