Which city was known as the ornament of the world?

The city known as the "ornament of the world" is often referred to as Istanbul, particularly during the Ottoman Empire. It was celebrated for its stunning architecture, rich culture, and historical significance, blending influences from both Europe and Asia. The city's landmarks, such as the Hagia Sophia and the Blue Mosque, exemplify its grandeur and beauty. Istanbul's strategic location and vibrant cosmopolitan atmosphere contributed to its reputation as a jewel of civilization.