Confessio Catholica
Confessio catholica is one of the main works of German Orthodox Lutheran theologian Johann Gerhard (1582–1637). It seeks to prove the evangelical and catholic character of the doctrine of the Augsburg Confession from the writings of approved Roman Catholic authors. "Confessio catholica, in qua doctrina catholica et evangelica, quam ecclesiae Augustanae confessioni addictae profilentur, ex Romano-catholicorum scriptorum suffragiis confirmatur" (4 parts, Frankfort and Leipsic, 1634–37), is based upon the "Catalogus testium veritatis" of Flacius. It is more comprehensive than its title denotes, being at the same time an extensive apology and polemic of the Evangelical Creed. The  first part is general and treats the "principia et media nostrae et pontificiae religionis". The other three volumes treat the disputed articles of faith in the order of Bellarmine, the controversialist "par excellence". Its contents may be compared with Gerhard's "Theological Commonplaces: On the Church," an earlier handling with many themes in common with the "Confessio Catholica."