Peter I

Peter I may refer to:

Religious hierarchs:

• Pope Peter, papal name sometimes referring to the Apostle Peter (c. 1 BC–AD 67)
• Patriarch Peter I of Alexandria (300–311)

Rulers:

• Tsar Peter I of Bulgaria (died 970)
• Count Peter I of Savoy (c. 1048–1078)
• King Peter I of Aragon and Navarre (1068/9–1104)
• Count Peter I of Barcelona=Catalonia, i.e. King Peter II the Catholic of Aragon (1178–1213)
• Latin Emperor Peter I of Constantinople (died 1219)
• Peter I, Duke of Brittany (c. 1190–1250)
• King Peter I of Valencia, i.e. King Pedro III of Aragon (1239–1285)
• Peter I, Duke of Bourbon (1311–1356)
• Peter I of Portugal (1320–1367)
• Peter I of Cyprus (1328–1369)
• King Pedro of Castile a.k.a. 'Pedro the Cruel' (1334–1369)
• Petru I of Moldavia (ruled 1375–1391)
• Pedro I of Kongo (ruled 1543–1545)
• Peter I, "The Great", of Russia, the first Russian czar titled emperor (1672–1725)
• Peter I of the Miskito nation (ruled 1729–1739)
• Peter I of Montenegro (1747–1830)
• Emperor Peter I of Brazil who declared independence (after, crowned as King Peter IV of Portugal) (1798–1834)
• King Peter I Karađorđević of Serbia, later Peter I King of the Serbs, Croats and Slovenes (i.e. of Yugoslavia) (1844–1921)