Which of the seven wonders of the ancient world did nebuchadnezzar built for his wife?

Nebuchadnezzar II is famously credited with building the Hanging Gardens of Babylon for his wife, Amytis of Media. According to legend, she longed for the green hills and valleys of her homeland, prompting Nebuchadnezzar to create this extraordinary series of terraced gardens. Although the existence of the gardens has been debated by historians, they remain one of the most celebrated wonders of the ancient world.