istanbul660ad.com City of Continuity A Byzantine beacon — where Constantinople thrived and empires converged. The pulse of a city bridging continents. A timestamp of faith, fortress, and flourishing. Byzantine Capital (660 AD) This vault honours the city that became Constantinople, heart of empire and faith. Within its glow lies Hagia Sophia, imperial walls, and the pulse of continuity. A sanctuary of fortress, faith, and sovereign city.