The Doctrine of Addai, The Apostle is a book written by George Phillips and published in 1876. The book is a translation of the Syriac text of the Doctrine of Addai, which is a document that tells the story of the conversion of the city of Edessa to Christianity in the 2nd century AD. The Doctrine of Addai is considered to be an important early Christian document, as it provides insight into the early Christian church and its practices. The book includes...