Mar 2 Lothair, King of the Franks and Holy Roman Emperor (b. 795) Jul 17 Leo IV, Italian Pope (reigned 847-55), dies Jul 31 Imam Ahmad ibn Hanbal, Muslim Jurisprudent (b. 780) Sep 29 Lotharius I, Romanian-French emperor (signed Treaty of Verdun), dies 852 AD Deaths in History by Year 856 AD