Constantinople is an ancient city in modern-day Turkey that's now known as Istanbul. ... Constantinople stood as the seat of the Byzantine Empire for the next 1,100 years, enduring periods of great fortune and horrific sieges, until being overrun by Mehmed II of the Ottoman Empire in 1453.

What's left of Constantinople?

The power centre of Constantinople comprising of Haghia Sophia, the Hippodrome, and the Great Palace was located in the modern-day neighbourhood of Sultanahmet. This is where you will find most of the surviving relics of Constantinople today.

What is the city Constantinople called today?

In 1453 A.D., the Byzantine Empire fell to the Turks. Today, Constantinople is called Istanbul, and it is the largest city in Turkey.