Konkordienformel
Over the eleven months following the publication of the "Torgau Book", suggested emendations were sent to Andreä and Chemnitz, and further revision was deemed necessary, so the second group (Andreä, Chemnitz, Selnecker, Chytraeus, Musculus, and Körner) revised the "Torgau Book" into its final form, known as the "Bergic Book" or the "Solid Declaration" of the "Formula of Concord." (Depending on the translation, the "Solid Declaration" is also known as the "Thorough Declaration of the Formula of Concord".) It was presented to Elector August of Saxony on May 28, 1577.