Northern Empire, Imperial City.
Just as the Diamond royal said, this world only had one Empire kingdom at the moment. Hence the kingdom did not need a name. And for that, whenever someone mentioned the 'Empire', no one would actually thought of other cities across the entire continent.
Right in the center of the holy city that was surrounded by three mountains, there was a large city within the city. The inner city was surrounded by a strong wall, separating it from the other parts of the entire city. Within the walls, there were towering spires and a vaulted dome supported by stone pillars across the entire area.
There was the residence of the Imperial Royal Family, Morlaix Palace.
