Catechism of the Catholic Church

The Catechism of the Catholic Church (Latin: Catechismus Catholicae Ecclesiae; commonly called the Catechism or the CCC) is a reference work that summarizes the Catholic Church's doctrine. It was promulgated by Pope John Paul II in 1992 as a reference for the development of local catechisms, directed primarily to those (in the church) responsible for catechesis and offered as "useful reading for all other Christian faithful".

Source: Wikipedia — Catechism of the Catholic Church (CC BY-SA 4.0)