Louis Chrétien Roersch (1831–1891) was a Belgian philologist who contributed 26 articles to the Biographie nationale de Belgique.
Roersch was born in Maastricht on 30 May 1831 and was educated at the athenaeum in the city.
[1] Meanwhile, he had on 15 September 1851 been appointed to teach Latin at the Royal athenaeum of Bruges, where he remained for fourteen years.
[1] On 12 October 1865, he was appointed to teach at the Normal School in Liège, and on 27 September 1872 he was appointed full professor at the Faculty of Philosophy and Letters of the University of Liège.
In 1884 he joined the editorial committee of the Biographie nationale, to which he contributed 26 articles.