Hanging Gardens of Babylon, ancient gardens considered one of the Seven Wonders of the World and thought to have been located near the royal palace in Babylon. By the beginning of the 21st century, the site of the Hanging Gardens had not yet been conclusively established. Nevertheless, many theories persisted regarding the structure and location of the gardens. Some researchers proposed that these were rooftop gardens. Another theory, popularized by the writings of British archaeologist Sir Leonard Woolley, suggested that the gardens were built within the walls of the royal palace at Babylon, the capital of Babylonia (now in southern