Who was the Orthodox Church founded by?

Jesus Christ

Eastern Orthodox Church
Language	Koine Greek, Church Slavonic, vernacular
Liturgy	Byzantine (nearly ubiquitous); also Western
Founder	Jesus Christ, according to sacred tradition
Origin	1st century, according to sacred tradition Judea, Roman Empire, according to sacred tradition

Who adopted Christianity in Ukraine?

Vladimir the Great
However, on territory of the Old Rus in Kyiv it became the dominant religion since its official acceptance in 988 by Vladimir the Great (Volodymyr the Great), who brought it from Byzantine Crimea and installed it as the state religion of medieval Kyivan Rus (Ruthenia), with the metropolitan see in Kyiv.

What church was responsible for the founding of the Russian Orthodox Church?

History of the Russian Orthodox Church

The Trinity Cathedral of Troitse-Sergieva Lavra
Primate	Patriarch Kirill I
Language	Church Slavonic (basic) and local languages
Headquarters	Moscow, Russia
Founder	Apostle Andrew, Vladimir of Kiev, Michael, 1st metropolitan of Kiev

What kind of church government and hierarchy is identified by the term Autocephalous?

Autocephaly (/ɔːtəˈsɛfəli/; from Greek: αὐτοκεφαλία, meaning “property of being self-headed”) is the status of a hierarchical Christian church whose head bishop does not report to any higher-ranking bishop. The term is primarily used in Eastern Orthodox and Oriental Orthodox churches.

Why did Prince Vladimir choose Orthodox Christianity?

988. He sent his emissaries to various countries to learn about their religions. Vladimir felt that Russia would become a unified nation if its people practiced one central religion. As a result, the prince chose the Byzantine faith of Orthodox Christianity as the faith to bring his country of turmoil into harmony.