A significant architectural achievement from the ancient Babylonian empire found in modern-day Iraq is the Ishtar Gate. Constructed around 575 BCE during the reign of King Nebuchadnezzar II, the gate served as a grand entryway to the inner city of Babylon. Adorned with blue glazed tiles and featuring reliefs of dragons and bulls, the Ishtar Gate embodied the artistic and architectural innovation of the Babylonians. It stands as a symbol of the empire's wealth and sophistication and has been reconstructed in museums, showcasing ancient Babylonian civilization.