The ancient structure located in the city of Babylon is the Ishtar Gate, a magnificent entryway that served as a prominent symbol of the city during its height. Built during the reign of King Nebuchadnezzar II around 575 BCE, the gate was adorned with blue glazed bricks and reliefs of dragons and bulls, representing deities and protection. It was part of a larger network of walls and structures that showcased Babylon's wealth and power, reflecting the advanced engineering and artistic skills of the Babylonians. The Ishtar Gate remains an iconic representation of ancient Mesopotamian architecture.