Documents, photographs, witness statements, films and all sources systematically collected by Porta Polonica are digitized and recorded in a database.
Fig. 1: Defence against Menno Simons
John à Lasco/Jan Łaski: Defensio Verae semperque In Ecclesia Receptae Doctrinæ De Christi Domini incarnatione, Adversus Mennonem Simonis Anabaptistarum Doctorem, Bonn 1545