Nicholas I may refer to: Pope Nicholas I ( 800–867), or Nicholas the Great Nicholas Mystikos (852–925), Patriarch Nicholas I of Constantinople Nicholas I (bishop of the Isles) (fl. 1147–1152), Bishop-elect of the Isles Nicholas I, Lord of Mecklenburg (died 1200) Nicholas I of Transylvania (died after 1203), voivode of Transylvania Nicholas I (bishop of Schleswig) (died 1233) Patriarch Nicholas I of Alexandria, Greek Patriarch of Alexandria between 1210 and 1243 Nicholas I, Duke of Troppau (c. 1255–1318), natural son of king Ottokar II of Bohemia, became Duke of Troppau in Silesia Nicholas I, Lord of Rostock (died 1314) Nicholas I, Count of Tecklenburg (died 1367) Nicholas I Garai (died 1386), chief governor of Bratislava, palatine to the King of Hungary Nicholas I of Opole ( 1424–1476) Nich
Nicolás I puede referirse a: el Papa Nicolás I ( 800–867), o Nicolás el Grande Nicolás Mystikos (852–925), el Patriarca Nicolás I de Constantinopla Nicolás I (obispo de las Islas) (fl. 1147–1152), el Obispo electo de las Islas Nicolás I, señor de Mecklenburgo (murió en 1200) Nicolás I de Transilvania (murió después de 1203), el voivod de Transilvania Nicolás I (obispo de Schleswig) (murió en 1233) el Patriarca Nicolás I de Alejandría, el Patriarca griego de Alejandría entre 1210 y 1243 Nicolás I, Duque de Troppau (c.