Socinianism is a form of Antitrinitarianism, name for Laelius Socinus (died 1562 in Zürich) and of his nephew Faustus Socinus (died 1604 in Poland). The former was one of the founders of a religious society that had to operate secretly in order to avoid persecution. The Socinian sect became far more widespread after Faustus Socinus, Laelius Socinus's nephew, became a valued member. In 1574 the Socinians, who referred to themselves as Unitarians, issued a "Catechism of the Unitarians," in which they laid out their views of the nature and perfection of the Godhead, as well as other principles of their group.