Question: When did the city where the developer of Annunciation of Cortona died officially become a Christian country?

<P0-S0> Nicene Christianity became the state church of the Roman Empire with the Edict of Thessalonica in 380 AD, when Emperor Theodosius I made it the Empire's sole authorized religion. <P0-S1> The Eastern Orthodox Church, Oriental Orthodoxy, and the Catholic Church each claim to be the historical continuation of this church in its original form, but do not identify with it in the caesaropapist form that it took later. <P0-S2> Unlike Constantine I, who with the Edict of Milan of 313 AD had established tolerance for Christianity without placing it above other religions and whose involvement in matters of the Christian faith extended to convoking councils of bishops who were to determine doctrine and to presiding at their meetings, but not to determining doctrine himself, Theodosius established a single Christian doctrine (specified as that professed by Pope Damasus I of Rome and Pope Peter II of Alexandria) as the Empire's official religion. <SEP> <P1-S0> The Annunciation of Cortona is a panel-painting altarpiece or retable by Fra Angelico: once housed in the Church of Gesù of Cortona, it is now held at the Museo Diocesano in Cortona. <SEP> <P2-S0> 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. <P2-S1> in ancient times, in the first centuries after the birth of christ, when this region was called[by whom?] <P2-S2> scythia - christians already lived there. <P2-S3> 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: великое княжество русское, ca 988 ad). <P2-S4> people of that time used to denote themselves christians (христиане, крестьяне) and russians (русские). <P2-S5> both terms had strong christian connotations. <P2-S6> [citation needed] it is also interesting that in time the term "крестьяне" acquired the meaning "peasants of christian faith" and later "peasants" (the main part of the population of the region), while the term "христиане" retained its religious meaning and the term "русские" 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. <P2-S7> in the region the "pravoslav faith" (православная вера - orthodox faith) or "russian faith" (русская вера) from earliest times became almost as known as the original "christian faith" (христианская, крестьянская вера). <P2-S8> also in some contexts the term "cossack" (козак, казак - free man by the will of god) was used[by whom?] <P2-S9> to denote "free" christians of steppe origin and russian language. <SEP> <P3-S0> In 1445 Pope Eugene IV summoned him to Rome to paint the frescoes of the Chapel of the Holy Sacrament at St Peter's, later demolished by Pope Paul III. <P3-S1> Vasari claims that at this time Fra Angelico was offered the Archbishopric of Florence by Pope Nicholas V, and that he refused it, recommending another friar for the position. <P3-S2> The story seems possible and even likely. <P3-S3> However, if Vasari's date is correct, then the pope must have been Eugene IV and not Nicholas, who was elected Pope only on 6 March 1447. <P3-S4> Moreover, the archbishop in 1446–1459 was the Dominican Antoninus of Florence (Antonio Pierozzi), canonized by Pope Adrian VI in 1523. <P3-S5> In 1447 Fra Angelico was in Orvieto with his pupil, Benozzo Gozzoli, executing works for the Cathedral. <P3-S6> Among his other pupils were Zanobi Strozzi. <SEP> <P4-S0> aránguiz (in basque arangiz and officially aránguiz / arangiz) is a village and city council in the municipality of vitoria-gasteiz in the province of álava, basque country, spain.