This is a timeline showing the dates when countries or polities made Christianity the official state religion, generally accompanying the baptism of the governing monarch.
Adoptions of Christianity to AD 1450
c. 34 or 200 – Osroene – disputed; both dates claimed
179 – Silures; traditional date, now considered questionable[1]
c. 1000 Christianization of Hungary with the first real Christian king(Roman Catholic became official but Orthodox(Eastern) existed as well since 973 onwards even after 1054).