You might have heard about the bunches of heresies that popped up in the early centuries of Christianity. But historians don't generally like using the term "heresy" to describe these groups.

The New York Times columnist and the singer/songwriter were born Jewish and have taken deep dives into Christianity.

The movement, which featured a set of theological doctrines in which Jewish Kabbalistic tradition merged with Muslim and later Christian elements, suffered a setback with Tsevi’s conversion to Islam ...

“For the Jew, Christianity is a heresy, an elevation of a false messiah,” Mark Oppenheimer, editor of the newly revamped religion site ARC, wrote last week. “Which is not to say that the ...

A comprehensive and authoritative account of the 'heretic' Marcion, this volume traces the development of the concept and language of heresy in the setting of an exploration of second-century ...

On Dec. 31, while many people are preparing for their New Years Eve parties, some Roman Catholic Christians will also mark ...

The Oxford English Dictionary defines heresy as "religious opinion or doctrine maintained in opposition, or held to be contrary, to the 'catholic' or orthodox doctrine of the Christian Church".