Nicholas I

Nicholas I may refer to:

Pope Nicholas I (c. 820 – 867), or Nicholas the Great
Nicholas Mysticus, patriarch Nicholas I of Constantinople (852–925)
Nicholas I, Bishop of Schleswig between 1209 and 1233
Patriarch Nicholas I of Alexandria, Greek Patriarch of Alexandria between 1210 and 1243
Nicholas I, Duke of Troppau, natural son of king Ottokar II of Bohemia, became Duke of Troppau in Silesia (c. 1255–1318)
Nicholas I Garay (died 1386), chief governor of Bratislava, palatine to the King of Hungary
Nicolaus I Bernoulli (1687–1759) in Basel; Swiss mathematician
Nicholas I of Russia (r. 1825–1855), Tsar of Russia and King of Poland
Nicholas I of Montenegro (1841–1921), king of Montenegro

This disambiguation page lists articles associated with the same personal name. If an internal link led you here, you may wish to change the link to point directly to the intended article.