Question: When did Christianity become the official religion of the empire that, in the 1st Century B.C., acquired the sunniest country in the world as a colony?

<P0-S0> Constantine's decision to cease the persecution of Christians in the Roman Empire was a turning point for early Christianity, sometimes referred to as the Triumph of the Church, the Peace of the Church or the Constantinian shift. <P0-S1> In 313, Constantine and Licinius issued the Edict of Milan decriminalizing Christian worship. <P0-S2> The emperor became a great patron of the Church and set a precedent for the position of the Christian emperor within the Church and the notion of orthodoxy, Christendom, ecumenical councils, and the state church of the Roman Empire declared by edict in 380. <P0-S3> He is revered as a saint and isapostolos in the Eastern Orthodox Church, Oriental Orthodox Church, and various Eastern Catholic Churches for his example as a ``Christian monarch. '' <SEP> <P1-S0> Most of Egypt's rain falls in the winter months. <P1-S1> South of Cairo, rainfall averages only around 2 to 5 mm (0.1 to 0.2 in) per year and at intervals of many years. <P1-S2> On a very thin strip of the northern coast the rainfall can be as high as 410 mm (16.1 in), mostly between October and March. <P1-S3> Snow falls on Sinai's mountains and some of the north coastal cities such as Damietta, Baltim, Sidi Barrany, etc. <P1-S4> and rarely in Alexandria. <P1-S5> A very small amount of snow fell on Cairo on 13 December 2013, the first time Cairo received snowfall in many decades. <P1-S6> Frost is also known in mid-Sinai and mid-Egypt. <P1-S7> Egypt is the driest and the sunniest country in the world, and most of its land surface is desert. <SEP> <P2-S0> armenia is a unitary, multi-party, democratic nation-state with an ancient cultural heritage. <P2-S1> urartu was established in 860 bc and by the 6th century bc it was replaced by the satrapy of armenia. <P2-S2> in the 1st century bc the kingdom of armenia reached its height under tigranes the great. <P2-S3> armenia became the first state in the world to adopt christianity as its official religion. <P2-S4> in between the late 3rd century to early years of the 4th century, the state became the first christian nation. <P2-S5> the official date of state adoption of christianity is 301 ad. <P2-S6> the ancient armenian kingdom was split between the byzantine and sasanian empires around the early 5th century. <SEP> <P3-S0> In 332 BC, Macedonian ruler Alexander the Great conquered Egypt as he toppled the Achaemenids and established the Hellenistic Ptolemaic Kingdom, whose first ruler was one of Alexander's former generals, Ptolemy I Soter. <P3-S1> The Ptolemies had to fight native rebellions and were involved in foreign and civil wars that led to the decline of the kingdom and its final annexation by Rome. <P3-S2> The death of Cleopatra ended the nominal independence of Egypt resulting in Egypt becoming one of the provinces of the Roman Empire. <SEP> <P4-S0> of the new eastern religions introduced into the greek world, the most successful was christianity. <P4-S1> from the early centuries of the common era, the greeks identified as romaioi ("romans"), by that time the name ‘hellenes’ denoted pagans. <P4-S2> while ethnic distinctions still existed in the roman empire, they became secondary to religious considerations and the renewed empire used christianity as a tool to support its cohesion and promoted a robust roman national identity. <P4-S3> concurrently the secular, urban civilization of late antiquity survived in the eastern mediterranean along with greco-roman educational system, although it was from christianity that the culture's essential values were drawn.