The capital of the Ottoman Empire was Constantinople, modern-day Istanbul, located in Turkey. The city served as the epicenter of the empire from its conquest by Mehmed II in 1453 until the empire's dissolution in 1922. Constantinople was strategically significant due to its location bridging Europe and Asia, which facilitated trade and cultural exchange. Its rich history encompasses various civilizations, including Roman, Byzantine, and Ottoman, contributing to its diverse architectural and cultural heritage.