He was also interested in the controversies which concerned the Augsburg Confession in Germany, especially after 1564, on the doctrine of the Person of Christ and the sacrament, and published several works against Westphal, Hesshusen, Selnecker, Johannes Brenz, and Jakob Andrea.
Ia juga tertarik pada kontroversi yang terkait Pengakuan Iman Augsburg di Jerman, khususnya setelah tahun 1564, mengenai doktrin Pribadi Kristus dan sakramen, serta menerbitkan beberapa karya menentang Westphal, Hesshusen, Selnecker, Johannes Brenz, dan Jakob Andrea.