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
edit4th century
edit- 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
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Baptism of Tiridates III
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Mirian III
5th century
edit- Óengus mac Nad Froích, King of Munster
- Clovis I, King of the Franks, circa 496-506
- Rechiar, King of the Suebi
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The baptism of Clovis I by Saint Remigius
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The baptism of Óengus mac Nad Froích by Saint Patrick
6th century
edit- 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
edit9th century
edit- Boris I of Bulgaria (864)
- Guthrum (878)
- Borivoj I, Duke of Bohemia (883)
- Rorik of Dorestad
- Harald Klak
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Baptism of Boris I
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Baptism of Borivoj I by Saint Methodius
10th century
edit- Mieszko I of Poland (966)
- Géza, Grand Prince of the Hungarians (970s)
- Vladimir I of Kiev (980s)
- Harald Bluetooth of Denmark and Norway
- Eric the Victorious
- Haakon the Good
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Baptism of Mieszko
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The Baptism of Saint Prince Vladimir, by Viktor Vasnetsov (1890)
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Harald being baptized by Poppo the monk, probably c. 960
11th century
edit- Olof Skötkonung, King of Sweden (1008)
14th century
edit- Jogaila, Grand Duke of Lithuania and King of Poland (1386)
16th century
edit- 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