The Secular Institute of Missionaries of the Kingship of Christ (SIM), an international institute of pontifical right, is located in more than 30 countries throughout the world and has a membership of more than 2200 members. It received initial papal approval in 1948 and definitive approval as a secular institute in 1953. SIM was founded in 1919 by Agostino Gemelli OFM and Armida Barelli. In 2007, Armida Barelli was proclaimed Venerable (Servant of God) by Pope Benedict XVI.
The life is one of total consecration to God in the spirit of St. Francis of Assisi in order to fulfill a mission in the world. SIM members do not live in community or share a common apostolate. The name “ Missionaries of the Kingship of Christ” reminds its members of the purpose of their consecration - the mission of giving witness to Christ, first born of all creatures, Lord of the universe and center of history. Missionaries collaborate in spreading the reign of God. They become the original sign of the mission of the Church in the world. Through lives of witness and service, members become a leaven to transform the world from within.