Saint Clelia Barbieri (†1870) was an Italian Roman Catholic and the founder of the Little Sisters of the Mother of Sorrows regarded as the youngest founder of a religious congregation in the history of the Catholic church. Barbieri declined the married life in her adolescence – even when pressured – in favor of leading a life dedicated to the needs of others; she served as an educator for a while and joined a religious movement that made her a notable figure in her village. Barbieri's canonization cause started on 15 March 1930 when she was made a Servant of God, progressed with her beatification on 27 October 1968, and culminated with her canonization on 9 April 1989 under Pope John Paul II.