An article on five major heresies of the Church: Legalism, Gnosticism, Arianism, Pelagianism and Socinianism.

An alphabetical list with short descriptions.

A list of heresies with some of the responses of the Church.

Short descriptions of a number of heresies, divided into heresies of Christ, of the trinity and of salvation.

An account and analysis of belief systems declared heretical by the Catholic Church. Site is sharply critical of authority and religion, and especially of the Church.

A history of Christianity starting with Jewish converts, the Nazarenes and Ebionites, then Arians, Marcionites, Gnostics, and finally the victory of (modern) Cappadocian-Pauline-Nicene Christianity from 380CE onwards.

Links to web pages and other resources on the history of early Christianity, with a focus on doctrine and heresy.

Short descriptions of Arianism, Docetism, Ebionitism, Pelagianism, Eutychianism, Nicolaitanism and Montanism.

A general Wikipedia article which also contains some heresies later than the early church period. Heresies are grouped into a number of categories, such as Christological, institutional, textual, and other.

Short descriptions of Gnosticism, Montanism, Monarchianism, Arianism, Apollinarianism, Nestorianism, Eutychianism and Pelagianism.

A list of heresies with short descriptions.