Louis Billot (12 January 1846 in Sierck-les-Bains, Moselle, France – 18 December 1931 in Ariccia, Latium, Italy) was a French Jesuit priest and theologian. He became a cardinal in 1911 by Pope St. Pius X. According to Marcel Lefebvre he was a close friend of the Ṕope.








