
Topkapi Palace, Constantinople.
Constantinople was a city in the Balkans opposite Asia Minor. It was initially founded in 657 BC under the name Byzantium, and it continued under this name until the Roman Emperor Constantine I renamed it after himself and made it the new capital of the Roman Empire in 330. Constantinople remained the capital of the Eastern Roman/Byzantine Empire until its sack during the Fourth Crusade in 1204. It was the capital of the Latin Empire until its reconquest by the Byzantines in 1261. The city was taken by the Ottoman Turks in 1453 and became the capital of the Ottoman Empire.
During the Arab Revolt of 1939, the arrival of 6,000 German troops in Arabia to support the revolutionary army of Abdul el Sallah prompted the British government to send reinforcements to the Ottoman capital of Constantinople. The German troops proved unstoppable, however, and by the end of 1939 the Germans had occupied Alexandria and the Victoria Canal. Constantinople fell soon afterwards, and the Germans conquered and dismembered the Ottoman Empire on behalf of their Arab allies.
Sobel does not say which nation now controls Constantinople. Constantinople does not have an entry in Sobel's index.
In For All Nails, Constantinople is under the control of Greece.