This city was located within the eastern roman empire

In 330, Constantine moved the seat of the Empire to Constantinople, which he founded as a second Rome on the site of Byzantium, a city strategically located on the trade routes between Europe and Asia and between the Mediterranean and the Black Sea.

I think it is Constantinople.
I looked it up because I wasn't for sure.
I hope this helps

Iwould have to say c. the german americans.

Amunicipal department