Episode 3 of 3
Issuance of the Syllabus of Errors
- When
- 8 December 1864
- Where
- Holy See
Pope Pius IX issued the Syllabus of Errors on 8 December 1864, attached to the encyclical Quanta cura, condemning 80 propositions.
The Syllabus errorum was an index document issued by the Holy See under Pope Pius IX on 8 December 1864. It collected 80 propositions considered current errors or heresies, pairing brief headings with references to various documents. The document was issued at the same time as the encyclical letter Quanta cura.
Sources
- Syllabus of Errors Wikipedia, revision of 2026-07-17
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.