Syllabus of Errors

Pope Pius IX

The Syllabus of Errors (Latin: Syllabus Errorum) is a document issued by the Holy See under Pope Pius IX on December 8, 1864, the Feast of the Immaculate Conception, as an annex to the Quanta cura encyclical.[1] It condemns a total of 80 errors or heresies, and through that promulgated Catholic Church teaching on a number of philosophical and political questions, and referred to documents issued previously.

Reaction from Catholics was mixed, while that from Protestants was uniformly negative. The document remains controversial, and has been cited on numerous occasions by both Catholic traditionalists seeking to uphold traditional Catholic values and anti-Catholics seeking to criticize the church's positions.[citation needed]

The purpose of the Syllabus was not to explain in depth the errors themselves, but only provide a list of them with a short paraphrasing of the error and references to the corresponding papal documents. The actual encyclicals listed reveal what it is about the error that is incorrect, and in which situations or nuances or emphasis. In order to understand the Pope’s argument against each error, one must read not only the error itself, but the document to which it points.


On December 8, 1864, the Feast of the Immaculate Conception the Holy See under Pope Pius IX issued the Syllabus of Errors, a compilation of what the Catholic Church believed to be heresies in the philosophical and political realm. It listed them, and referred to older Church documents previously issued on these matters.[citation needed]

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čeština: Syllabus omylů
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italiano: Sillabo
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日本語: 誤謬表
português: Sílabo dos erros
русский: Силлабус
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