They include Jewish Christianity, Pauline Christianity and Gnostic Christianity. All modern Christian denominations are said to have descended from the Jewish and Pauline Christianities, with Gnostic Christianity dying, or being hunted, out of existence after the early Christian era and being largely forgotten until discoveries made in the late 19th and early twentieth centuries. read more
For the first thousand years of Christianity, there were no denominations within Christianity as there are today. Various offshoot groups certainly existed, but most were small and quickly snuffed out as "heresies.". read more