The ancient city of Istanbul is located in Turkey. Situated on both sides of the Bosporus Strait, Istanbul serves as a bridge between Europe and Asia, making it a historically significant cultural and commercial center. Originally known as Byzantium, it was later renamed Constantinople after Emperor Constantine the Great made it the capital of the Roman Empire. Renowned for its rich history and architectural wonders, including the Hagia Sophia and the Blue Mosque, Istanbul reflects a unique blend of Eastern and Western influences. Today, the city continues to thrive as one of the largest and most vibrant metropolises in the world.