This was a religious conference, held in 1531, to consider the rights of the Anabaptists in Prussia. On the Lutheran side, the debate was conducted by Poliander (q.v.), Speratus (q.v.), and Brismann; on the part of the Anabaptists. Peter Zenker (q.v.), preacher at Dantzic, replied. Duke Albert was present, and finally decided against the Anabaptists. who were banished peremptorily from the country. The Conversation at Rastenburg had been preceded by a synod, held there in 1530, on which occasion Zenker had presented his confession of faith.