The Syllabus of Errors is the most useful document.
Condemnations that jumped out at me this time through: (first given is the condemned idea, then a source where it is condemned)
#55. The Church ought to be separated from the .State, and the State from the Church. — Allocution “Acerbissimum,” Sept. 27, 1852.
#22. The obligation by which Catholic teachers and authors are strictly bound is confined to those things only which are proposed to universal belief as dogmas of faith by the infallible judgment of the Church. — Letter to the Archbishop of Munich, “Tuas libenter,” Dec. 21, 1863.
#16. Man may, in the observance of any religion whatever, find the way of eternal salvation, and arrive at eternal salvation. — Encyclical “Qui pluribus,” Nov. 9, 1846.
#15. Every man is free to embrace and profess that religion which, guided by the light of reason, he shall consider true. — Allocution “Maxima quidem,” June 9, 1862; Damnatio “Multiplices inter,” June 10, 1851.
#18. Protestantism is nothing more than another form of the same true Christian religion, in which form it is given to please God equally as in the Catholic Church. — Encyclical “Noscitis,” Dec. 8, 1849.
#17: Good hope at least is to be entertained of the eternal salvation of all those who are not at all in the true Church of Christ. — Encyclical “Quanto conficiamur,” Aug. 10, 1863, etc.
So much for indifferentism, relativism, universalism, religious liberty, americanism, and modernism.














