The Syllabus of Errors is the name given to a document issued by the Holy See under Pope Pius IX on 8 December 1864, as an appendix to his encyclical letter Quanta cura.[1] It condemns a total of 80 propositions that the Pope considered to be errors or heresies.
The Syllabus was intended to be a rebuttal of liberalism, modernism, moral relativism, secularization, and the political emancipation of Europe from the tradition of Catholic monarchies.[2]