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Pierre de Castelnau, Blessed
newadvent.org
Cistercian, worked for the conversion of the Albigensians, was martyred in 1208.
Pierre de Maricourt
newadvent.org
Article on this 13th-century theorist of optics and magnetism, written by Pierre Duhem.
Pierre-Rose-Ursule-Dumoulin Borie, Saint
newadvent.org
Short biography of the nineteenth-century French missionary priest and martyr.
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