Are Cistern of Aetius and Hirami Ahmet Pasha Mosque both churches?
Cistern of Aetius: The Cistern of Aetius (), known since the Ottoman period as Çukurbostan ("sunken garden") and since 1928 as Karagümrük stadyumu ("Karagümrük stadium") or Vefa stadyumu ("Vefa stadium"), was a Byzantine open-sky water reservoir in the city of Constantinople, important for historical reasons.
i don't know