In the late tenth century, Vladimir, the prince of Kiev, adopted Byzantine Christianity and ordered the mass baptism of Russians.
King Ezana was the king of the Axum Empire from 330-356 A.D. He was the first axumite ruler to convert to Christianity and conquered the kingdom of Nubia in about 350 A.D.
Ivan III
The Emperor Constantine, who was the ruler of the eastern empire, converted to Christianity and made it the state religion. This began the Holy Roman Empire.
Bolsheviks
Catherine the Great was the Russian ruler who was admired by the philosophes during the revolution. She reigned from 1762 to 1796.
Vladimir
Clovis
King Ezana was the king of the Axum Empire from 330-356 A.D. He was the first axumite ruler to convert to Christianity and conquered the kingdom of Nubia in about 350 A.D.
Vladimir I, also known as Vladimir the Great, became the grand prince of Kiev and chose Eastern Orthodox Christianity as the official state religion in 988. This decision had a lasting impact on the cultural and religious development of Russia.
Ivan III
For what was suppose to be Christianity was instituted by Constatine. that answer is wrong the first roman ruler to adopt Christianity as roman official religion was Theodosius They are both right, Constatine 1 and theodosius 1
westernize Russia
Ivan IV or Ivan the Terrible
A Russian ruler was called a Tsar or Czar, depending on your preferred spelling.
Many will point to Constantine as the first in circa 325 AD.
The Emperor Constantine, who was the ruler of the eastern empire, converted to Christianity and made it the state religion. This began the Holy Roman Empire.
tsar