
Wilhelm Guiskard (1216-) was a bishop of the Teutonic Order. He converted the people around the Teutonic stronghold of Dunaburg to Christianity. However, Wilhelm Guiskard later fell to heresy and became a Heretic preacher near Konigsberg.
Wilhelm Guiskard (1216-) was a bishop of the Teutonic Order. He converted the people around the Teutonic stronghold of Dunaburg to Christianity. However, Wilhelm Guiskard later fell to heresy and became a Heretic preacher near Konigsberg.