 Diether refused to cease reforms in the church, and thus Pius II declared Adolph of Nassau the Archbishop of Mainz, beginning the Mainz Feud.The archdiocese was wracked by violent warfare.On the night of 28 October 1462 Adolph captured the city of Mainz, killed 400 citizens and had another 400 including Johannes Gutenberg exiled, and revoked its town charter and status as an Imperial City.