Qin, and the continued existence of the Eastern Jin dynasty. According to archaeologists, sufficient archaeological evidence correlates of state-level societies coalesced in the 4th century to show the existence in Korea of the Three Kingdoms (300/400–668 CE) of Baekje, Goguryeo, and Silla. Long Fourth Century Historians of the Roman Empire refer to the "Long Fourth Century" to the period spanning the fourth century proper, but starting earlier with the accession of the Emperor Diocletian in 284 and ending later with the death of Honorius in 423 or of Theodosius II in 450. Events Early 4th century – Former audience hall now known as the Basilica, Trier, Germany, is built. 301: Armenia first to adopt Christianity as state religion. 304–439: The Sixteen Kingdoms in China begins. 306–337: Constantine the Great, ends persecution of Christians in the Roman Empire (see also Constantinian shift) and Constantinople becomes new seat of government (New Rome). 320: Butuan Boat One, the oldest known Balangay, a multi-purpose ship native to the Philippines is built. 325–328: The Kingdom of Aksum adopts Christianity. 325: Constantine the Great calls the First Council of Nicaea to pacify Christianity in the grip of the Arian controversy. 335–380: Samudragupta expands the Gupta Empire. 337: Constantine the Great is baptized on his death bed. 350: About this time the Kingdom of Aksum conquers the Kingdom of Kush. 350–400: At some time during this period, the Huns began to attack the Sassanid Empire. 350: The Kutai Martadipura kingdom in eastern Borneo produced the earliest known stone inscriptions in Indonesia known as the Mulavarman inscription written in the Sanskrit language using Pallava scripture. Mid-4th century – Dish, from Mildenhall, England, is made. It is now kept at the British Museum, London. Mid-4th century – Wang Xizhi makes a portion of a letter from the Feng Ju album. Six Dynasties period. It is now kept at National Palace Museum, Taipei, Taiwan, Republic of China. 365: An earthquake with a magnitude of at least eight strikes the Eastern Mediterranean. The following tsunami causes widespread destruction in Crete, Greece, Libya, Egypt, Cyprus, and Sicily. 376: Visigoths appear on the Danube and are allowed entry into the Roman Empire in their flight from the Huns. 378: Battle of Adrianople: Roman army is defeated by the Visigoth cavalry. Emperor Valens is killed. 378–395: Theodosius I, Roman emperor, bans pagan worship, Christianity is made the official religion of the Empire. 378: Siyaj