Freiherr Wilhelm Emmanuel von Ketteler was a German theologian and politician who served as Bishop of Mainz. His social teachings became influential during the papacy of Leo XIII and his encyclical Rerum novarum.
- Occupation
- Catholic priest, politician, writer, Catholic bishop
- Position held
- member of the Reichstag of the German Empire, Member of the Frankfurt Parliament, Roman Catholic Bishop of Mainz, bishop
- Citizenship
- Kingdom of Prussia
- Born
- December 25, 1811
