The Hanging Gardens of Babylon
The Hanging Gardens of Babylon, one of the Seven Wonders of the Ancient World, were built by King Nebuchadnezzar II, who ruled the city for 43 years starting in 605 BC.
According to accounts, the gardens were built to cheer up Nebuchadnezzar's homesick wife, Amyitis. Amyitis, daughter of the king of the Medes, was married to Nebuchadnezzar to create an alliance between the nations. The land she came from, though, was green, rugged and mountainous, and she found the flat, sun-baked terrain of Mesopotamia depressing. The king decided to recreate her homeland by building an artificial mountain with rooftop gardens.
The Hanging Gardens probably did not really "hang" in the sense of being suspended from cables or ropes. The name comes from an inexact translation of the Greek word kremastos or the Latin word pensilis, which mean not just "hanging", but "overhanging" as in the case of a terrace or balcony.
How big were the gardens? Diodorus tells us it was about 400 feet wide by 400 feet long and more than 80 feet high. Other accounts indicate the height was equal to the outer city walls. Walls that Herodotus said were 320 feet high. In any case the gardens were an amazing sight: A green, leafy, artificial mountain rising off the plain.