Konkordienbuch
These writings were used as the normative proclamation and teaching of that group or denomination of Christians. For Lutheranism in the mid—16th century these anthologies were formulated for the various duchies and principalities of the Holy Roman Empire. They were the prototype of the Book of Concord, which historically is considered by Lutherans to be their definitive "Body of Doctrine". However, because some of the "corpera doctrinæ" were considered to be faulty and to avoid confusion of the Book of Concord with the "Corpus doctrinæ Philippicum", the compilers of the Book of Concord deliberately refrained from using the designation "corpus doctrinæ" for it.