You asked:

what was the capital of the roman empire

  • Roman Empire's capital cities are Rome, Constantinople, Milan, Ravenna, Kocaeli, Istanbul and ─░znik.
  • Rome
    Rome
  • Constantinople
    Constantinople
    Constantinople

  • Milan
    Milan
  • Ravenna
    Ravenna
    Ravenna

  • Kocaeli

  • Istanbul

  • ─░znik