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Heresies and Heretics: Getting Started

In Catholicism, heresy is a controversial or unorthodox theological challenge that conflicts with scripture, Church Tradition, dogma, or doctrine.

This research guide...

The purpose of this research guide is to provide an introduction to the basic resources for the study of doctrinal teachings, theological disputes, heresies and controversies of the Christian church.

Christian heresies

"During the first five centuries or so of Christianity, a number of false teachings, called heresies, about Jesus arose in the church.  They clustered into two main categories: one that denied Jesus' humanity, the other that denied his divinity." (Pennock, M.F. The Seeker's Catacheism; pg. 17)

Irenaeus of Lyons "Adversus Haereses"

Albigensian Crusade (1209–1229)

Good online reference source: Encyclopedia of Religion

St. Augustine of Hippo


Image: "St. Augustine and St. Monica"

Off Campus Access


Online databases and electronic journals subscribed to by the UST Libraries are licensed for use by the St. Thomas community ONLY.  Because of this restriction, we need to verify that anyone accessing these databases is a current member of the St. Thomas community.

Subject Guide

Betsy Polakowski's picture
Betsy Polakowski
Theological Librarian (Interim) / Collection Management Services

Subject Liaison to Theology, St. Paul Seminary School of Divinity

Archbishop Ireland Memorial Library

Marcion, of Sinope (2nd cent.)