The Purple Mantle

History
657 BC.: The city of Bizantium is Founded by Greek colonists from Megara.

293 AC: The emperor Diocletian created a new administrative system: The Tetrarchy, in order to guarantee security and improve his control over his vast Empire. He associated himself with a co-emperor: The Augustus. The Tetrarchy collapsed in 313.

330 AC: The Emperor Constantine I renamed the city as Constantinopolis and transformed it into the new Roman Empire Capital.

395: Emperor Theodosius I bequeathed the imperial office jointly to his sons: Arcadius in the East and Honorius in the West.

476: After the deposition of the Last Western Emperor: Romulus Augustulus, Eastern Emperor Zeno abolished the division of the Empire making himself sole Emperor.

527: Justinian I assumes the Throne and begins a campaign to retake the lost territories in the Mediterranean Europe and Africa, as well as multiple reformations.

C.VI to X: The Empire sustained itself through commerce and politics, advancing and receding territories over time.

C.XI: the Crecent Arabic presence and the divisions weakened the Empire. The crusades continue this process.

C.XIV: The arrival of the Seljuk Turks led to the rise of the Ottomans and important advances over the declining Empire.

1453: PoD: The Ottoman Advance finished the Eastern Roman Empire, but the city remains undefiled and so does the Ancient Tradition in it...
 * European-Asian Trading Continues.

1465: The Eastern Empire is Gone, What's left is Constantinople and a few surrounding territories, The Emperor Constantine XI Palaiologos dumped his Imperial dignities and Created the Byzantine Kingdom Instead, using however much of the previous System elements.