Anathema Sit!

Veneration of Images
If anyone does not salute such representations as standing for the Lord and his saints, let him be anathema.
- Second Council of Nicaea, 787.

The Scriptures

If anyone does not accept as sacred and canonical the aforesaid books in their entirety and with all their parts, as they have been accustomed to be read in the Catholic Church and as they are contained in the old Latin Vulgate Edition, and knowingly and deliberately rejects the aforesaid traditions, let him be anathema.
- Council of Trent, Session 4.

Justification

If any one says, that justifying faith is nothing else but confidence in the divine mercy which remits sins for Christ's sake; or, that this confidence alone is that whereby we are justified; let him be anathema. (Canon 12).

If any one says, that the justice received is not preserved and also increased before God through good works; but that the said works are merely the fruits and signs of Justification obtained, but not a cause of the increase thereof; let him be anathema. (Canon 24).

If any one says, that, after the grace of Justification has been received, to every penitent sinner the guilt is remitted, and the debt of eternal punishment is blotted out in such wise, that there remains not any debt of temporal punishment to be discharged either in this world, or in the next in Purgatory, before the entrance to the kingdom of heaven can be opened (to him); let him be anathema. (Canon 30).

If any one says, that the good works of one that is justified are in such manner the gifts of God, as that they are not also the good merits of him that is justified; or, that the said justified, by the good works which he performs through the grace of God and the merit of Jesus Christ, whose living member he is, does not truly merit increase of grace, eternal life, and the attainment of that eternal life,-if so be, however, that he depart in grace,-and also an increase of glory; let him be anathema. (Canon 32).
- Council of Trent, Session 6.

Sacraments

If anyone says that the sacraments of the New Law are not necessary for salvation but are superfluous, and that without them or without the desire of them men obtain from God through faith alone the grace of justification, though all are not necessary for each one, let him be anathema.
- Council of Trent, Session 7, Canon 4.

Baptism

If anyone says that baptism is optional, that is, not necessary for salvation, let him be anathema.
- Council of Trent, Session 7, Canon 5.

Eucharist

If any one denies, that, in the sacrament of the most holy Eucharist, are contained truly, really, and substantially, the body and blood together with the soul and divinity of our Lord Jesus Christ, and consequently the whole Christ; but says that He is only therein as in a sign, or in figure, or virtue; let him be anathema. (Canon 1).

If any one says, that, in the sacred and holy sacrament of the Eucharist, the substance of the bread and wine remains conjointly with the body and blood of our Lord Jesus Christ, and denies that wonderful and singular conversion of the whole substance of the bread into the Body, and of the whole substance of the wine into the Blood-the species Only of the bread and wine remaining-which conversion indeed the Catholic Church most aptly calls Transubstantiation; let him be anathema. (Canon 2).

If any one says, that, in the holy sacrament of the Eucharist, Christ, the only-begotten Son of God, is not to be adored with the worship, even external of latria; and is, consequently, neither to be venerated with a special festive solemnity, nor to be solemnly borne about in processions, according to the laudable and universal rite and custom of holy church; or, is not to be proposed publicly to the people to be adored, and that the adorers thereof are idolaters; let him be anathema. (Canon 6).

lf any one says, that Christ, given in the Eucharist, is eaten spiritually only, and not also sacramentally and really; let him be anathema. (Canon 8)
- Council of Trent, Session 13.

Penance

If any one denies, either that sacramental confession was instituted, or is necessary to salvation, of divine right; or says, that the manner of confessing secretly to a priest alone, which the Church hath ever observed from the beginning, and doth observe, is alien from the institution and command of Christ, and is a human invention; let him be anathema. (Canon 6).

If any one says, that God always remits the whole punishment together with the guilt, and that the satisfaction of penitents is no other than the faith whereby they apprehend that Christ has satisfied for them; let him be anathema. (Canon 12).

If any one says, that satisfaction for sins, as to their temporal punishment, is nowise made to God, through the merits of Jesus Christ, by the punishments inflicted by Him, and patiently borne, or by those enjoined by the priest, nor even by those voluntarily undertaken, as by fastings, prayers, almsdeeds, or by other works also of piety; and that, therefore, the best penance is merely a new life; let him be anathema. (Canon 13).

If any one says, that the satisfaction, by which enitents redeem their sins through Jesus Christ, are not a worship of God, but traditions of men, which obscure the doctrine of grace, and the true worship of God, and the benefit itself of the death of Christ; let him be anathema. (Canon 14).
- Council of Trent, Session 14.

The Mass

If any one says, that the sacrifice of the mass is only a sacrifice of praise and of thanksgiving; or, that it is a bare commemoration of the sacrifice consummated on the cross, but not a propitiatory sacrifice; or, that it profits him only who receives; and that it ought not to be offered for the living and the dead for sins, pains, satisfactions, and other necessities; let him be anathema.
Council of Trent, Session 22, Canon 3.

If any one says, that there is not in the New Testament a visible and external priesthood; or that there is not any power of consecrating and offering the true body and blood of the Lord, and of forgiving and retaining sins; but only an office and bare ministry of preaching the Gospel, or, that those who do not preach are not priests at all; let him be anathema. (Canon 1).

If any one says, that, in the Catholic Church there is not a hierarchy by divine ordination instituted, consisting of bishops, priests, and ministers; let him be anathema. (Canon 6).
- Council of Trent, Session 23.

Indulgences

…the use of indulgences, most salutary to the Christian people and approved by the authority of the holy councils, is to be retained in the Church, and it condemns with anathema those who assert that they are useless or deny that there is in the Church the power of granting them.
- Council of Trent, Session 25, Decree Concerning Indulgences.

Celibacy

If any one says, that the marriage state is to be placed above the state of virginity, or of celibacy, and that it is not better and more blessed to remain in virginity, or in celibacy, than to be united in matrimony; let him be anathema.
- Council of Trent, Session 24, Canon 10.

Papal Supremacy and Infallibility

Therefore, if anyone says that blessed Peter the apostle was not appointed by Christ the lord as prince of all the apostles and visible head of the whole church militant; or that it was a primacy of honour only and not one of true and proper jurisdiction that he directly and immediately received from our lord Jesus Christ himself: let him be anathema. Therefore, if anyone says that it is not by the institution of Christ the lord himself (that is to say, by divine law) that blessed Peter should have perpetual successors in the primacy over the whole church; or that the Roman pontiff is not the successor of blessed Peter in this primacy: let him be anathema.

So, then, if anyone says that the Roman pontiff has merely an office of supervision and guidance, and not the full and supreme power of jurisdiction over the whole church, and this not only in matters of faith and morals, but also in those which concern the discipline and government of the church dispersed throughout the whole world; or that he has only the principal part, but not the absolute fullness, of this supreme power; or that this power of his is not ordinary and immediate both over all and each of the churches and over all and each of the pastors and faithful: let him be anathema.
- First Vatican Council.

Immaculate Conception

We declare, pronounce, and define that the doctrine which holds that the most Blessed Virgin Mary, in the first instance of her conception, by a singular grace and privilege granted by Almighty God, in view of the merits of Jesus Christ, the Savior of the human race, was preserved free from all stain of original sin, is a doctrine revealed by God and therefore to be believed firmly and constantly by all the faithful."

Hence, if anyone shall dare -- which God forbid! -- to think otherwise than as has been defined by us, let him know and understand that he is condemned by his own judgment; that he has suffered shipwreck in the faith; that he has separated from the unity of the Church; and that, furthermore, by his own action he incurs the penalties established by law if he should are to express in words or writing or by any other outward means the errors he think in his heart.
- Ineffabilis Deus, Apostolic Constitution, Pope Pius IX , 1854.

Assumption

The Immaculate Mother of God, the ever Virgin Mary, having completed the course of her earthly life, was assumed body and soul into heavenly glory. Hence if anyone, which God forbid, should dare willfully to deny or to call into doubt that which we have defined, let him know that he has fallen away completely from the divine and Catholic Faith.
- Munificentissimus Deus, Pope Pius XII, 1950.