The official, definitive and in-depth instruction on the Sacraments of the Catholic Church from articles 1113 to 1134 in the Catechism of the Catholic Church. It elaborates the commonalities of all seven Sacraments.
The seven Sacraments listed with links to articles about each: Baptism, Eucharist, Reconciliation, Confirmation, Marriage, Holy Orders, Anointing of the Sick
A thorough traditional treatment of the Sacraments from the Council of Trent in the form of anathemae in response to uncertainties amongst the faithful of the time.