Hippolytus is one of the most enigmatic figures in the history of the early Church. In 1841 a single manuscript containing a Refutation of All Heresies was discovered and eventually attributed to Hippolytus. In the late nineteenth and early twentieth century the complete texts of some of his commentaries and homilies were discovered in Slavonic, Armenian and Georgian translations, and a few portions of his works in Greek. Eusebius, who provides the earliest information about Hippolytus, names him, along with Beryllus of Bostra and Gaius of Rome, as one of the learned churchmen of that time. The two works that go under the titles of the Canons of Hippolytus and the Apostolic Tradition represent a specialized field of study in themselves. The work known as the Apostolic Tradition appears in several collections of Church Orders dating from the fourth century, and is sometimes in longer and sometimes in shorter form. It exists in Sahidic, Bohairic, Arabic, Ethiopic and Latin versions.