John Main OSB (1926–1982) was a Roman Catholic priest and Benedictine monk who presented a way of Christian meditation which utilized a prayer-phrase or mantra. In 1975, Main began Christian meditation groups which met at Ealing Abbey, his monastery in West London, England and, later, in Montreal, Canada. These were the origins of the ecumenical network of Christian meditation groups which have become the World Community for Christian Meditation (WCCM).