Saint Patrick was a fifth-century Romano-British Christian missionary and bishop in Ireland. Known as the "Apostle of Ireland", he is the primary patron saint of Ireland.  Patrick was never formally canonized, having lived prior to the current laws of the Catholic Church in these matters. Nevertheless, he is venerated as a Saint in the Catholic Church and in the Eastern Orthodox Church, where he is regarded as equal-to-the-apostles and Enlightener of Ireland. The dates of Patrick's life cannot be fixed with certainty, but there is general agreement that he was active as a missionary in Ireland during the fifth century. A recent biography on Patrick shows a late fourth-century date for the saint is not impossible.