Wilhelm Emmanuel Freiherr von Ketteler (1811–1877)
Born 1811 CE, died 1877 CE.
Freiherr Wilhelm Emmanuel von Ketteler (25 December 1811 – 13 July 1877) 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.
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