Maciej Ptaszyński (Ph.D. 2007) is an associate professor at University of Warsaw. His most recently published book Reformacja w Polsce a dziedzictwo Erazma z Rotterdamu, (2018) received a Prize of the Ministry of Science for the best academic monograph in 2019.Kazimierz Bem (Ph.D. 2007) is a pastor and a lecturer in church history at the Evangelical School of Theology in Wrocław. He recently published with Brill in the book series St. Andrew’s Studies in Reformation History: Calvinism in the Polish Lithuanian-Commonwealth 1548–1648. The Churches and the Faithful. (2020).