The Syllabus of Errors (Latin: Syllabus Errorum) is a document issued by the Holy See under Pope Pius IX on 8 December 1864, as an appendix to the Quanta cura encyclical. It condemns a total of 80 errors or heresies, articulating Catholic Church teaching on a number of philosophical and political questions. The purpose of the Syllabus was not to explain in depth, but only to summarize each error briefly and to refer to the corresponding papal documents which define and explicate in detail. These detailed documents are essential for understanding the pope's view.