Christian
The region of modern Eastern Europe and Central Eurasia (Russia, Ukraine and other countries of the ex-USSR) have a long history of Christianity and Christian communities on its lands. In ancient times, in the first centuries after the birth of Christ, when this region was called[by whom?] Scythia - Christians already lived there. Later the region saw the first states to adopt Christianity officially - initially in Armenia (301 AD) and in Georgia (337 AD), later in the Great Russian Principality (Kyivan Rus, Russian: Velikoe kniazhestvo Russkoe, ca 988 AD). People of that time used to denote themselves Christians (khristiane, krest'iane) and Russians (russkie). Both terms had strong Christian connotations.[citation needed] It is also interesting that in time the term "krest'iane" acquired the meaning "peasants of Christian faith" and later "peasants" (the main part of the population of the region), while the term "khristiane" retained its religious meaning and the term "russkie" began to mean representatives of the heterogeneous Russian nation formed on the basis of common Christian faith and language,[citation needed] which strongly influenced the history and development of the region. In the region the "Pravoslav faith" (pravoslavnaia vera - Orthodox faith) or "Russian faith" (russkaia vera) from earliest times became almost as known as the original "Christian faith" (khristianskaia, krest'ianskaia vera). Also in some contexts the term "cossack" (kozak, kazak - free man by the will of God) was used[by whom?] to denote "free" Christians of steppe origin and Russian language.
What was the region of Eastern Europe called in 1 AD?
Scythia
Scythia - Christians already lived there.
the region