In Today's Catholic World News Blog

The Manual for Inquisitors, "Directorium Inquisitorum," is the definitive 14th-century guide for inquisitorial procedure, authored by the Spanish theologian and Grand Inquisitor of Aragon, Nicholas Eymerich, in 1376 A.D.


Note: The edition TCW is posting includes the influential 16th-century commentaries of the Aragonese canonist Francisco Peña (Pegna), which have helped maintain the book's status as a primary legal authority for time immemorial.


This is a goldmine. The famed text is in Latin; we recommend using DeepL Translator, often cited as the best online translation service available, to better dig into this Catholic treasure.


Click this link (which provides various formats) to view Eymerich's imperative work.


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Feb 15, 2026