- Italian ecclesiastic: pope 858–867.
- czar of Russia 1825–55.
- Saint, called the Great. died 867 ad, Italian ecclesiastic; pope (858–867). He championed papal supremacy. Feast day: Nov 13
- 1796–1855, tsar of Russia (1825–55). He gained notoriety for his autocracy and his emphasis on military discipline and bureaucracy
