Philibert Vrau was a 19th-century French businessman and Catholic activist who lived in Lille. Born in 1829, he became a prominent figure in Christian socialism, combining his industrial interests with deep religious convictions. After returning to the Catholic faith in 1854, he dedicated much of his life to improving the conditions of the working class. He worked alongside his brother-in-law to establish social organizations and housing projects, advocating for fair wages and better living standards for laborers.