Various 
The Confutatio Pontificia 

In the mid 16th century, a gathering of Protestant leaders and the Holy Roman Empire attempted to restore religious unity, but failed. The resulting Confession of Augsburg and the official refutation, the Confutatio Pontificia, became primary documents of the Lutheran faith. Written primarily by theologian Johann Eck, the Confutatio outlines the Roman Catholic faith and provides insight into the Protestant Reformation and Lutheran Theology. An important read for historians and theologians alike, this document sheds light on a pivotal moment in religious history.