List of rulers who converted to Christianity

This is a list of rulers who converted to Christianity. The conversion of monarchs was often an important step in the process of Christianization.

1st century

• Abgar V, King of Osroene with his capital at Edessa, c. 1st century

4th century

• Tiridates III of Armenia, King of Armenia, in 301
• Ezana of Axum, King of Aksum, 320
• Constantine I, Roman emperor, in 337
• Mirian III of Iberia, King of Iberia, c. 337

• 
  Baptism of Tiridates III
• 
  The Baptism of Constantine
• 
  Mirian III

5th century

• Óengus mac Nad Froích, King of Munster
• Clovis I, King of the Franks, circa 496-506
• Rechiar, King of the Suebi

• 
  The baptism of Clovis I by Saint Remigius
• 
  The baptism of Óengus mac Nad Froích by Saint Patrick

6th century

• Constantine of Dumnonia
• Saint Constantine of Strathclyde
• Rædwald of East Anglia
• Reccared I, king of visigoths, and Hermenegild, sub-king in Baetica, converted from Arianism to the Nicene faith.

7th century

• Æthelberht of Kent before 601 (see Gregorian mission)
• Cenwalh of Wessex
• Cynegils of Wessex
• Sigeberht of East Anglia
• Riderch I of Alt Clut
• Peada of Mercia
• Edwin of Northumbria

9th century

• Mojmir I of Moravia (818 or 824)
• Boris I of Bulgaria (864)
• Guthrum (878)
• Borivoj I, Duke of Bohemia (883)
• Rorik of Dorestad
• Harald Klak

• 
  Baptism of Boris I
• 
  Baptism of Borivoj I by Saint Methodius

10th century

• Mieszko I of Poland (966)
• Géza, Grand Prince of the Hungarians (970s)
• Vladimir I of Kiev (980s)
• Olaf Tryggvason
• Harald Bluetooth of Denmark and Norway
• Eric the Victorious
• Haakon the Good

• 
  Baptism of Mieszko
• 
  The Baptism of Saint Prince Vladimir, by Viktor Vasnetsov (1890)
• 
  Harald being baptized by Poppo the monk, probably c. 960

11th century

• Olof Skötkonung, King of Sweden (1008)

14th century

• Jogaila, Grand Duke of Lithuania and King of Poland (1386)

16th century

• Nzinga of Ndongo and Matamba
• Afonso I of Kongo
• Humabon, Rajah of Cebu (1521)
• Bunao Lakan Dula, Lakan of Tondo (c. 1571)
• Rajah Matanda of Maynila (1572)
• Ōtomo Sōrin (although not a direct royalty, Japanese daimyo were de facto independent rulers of their territories)
• Arima Harunobu
• Ōmura Sumitada

19th century

• Hone Heke
• Keopuolani
• Ka'ahumanu
• Kamehameha III
• Tamati Waka Nene
• Ranavalona II of Madagascar
• Pomare II
• Duleep Singh