Which of the Seven Wonders of the Ancient World is the oldest?

The Seven Wonders of the World or the Seven Wonders of the Ancient World refers to remarkable constructions of classical antiquity listed by various authors in guidebooks or poems popular among ancient Hellenic tourists, particularly in the 1st and 2nd centuries BC. The most prominent of these lists, the versions by Antipater of Sidon and an observer identified as Philo of Byzantium, name seven works located around the eastern Mediterranean rim. The original list inspired innumerable versions through the ages, often listing seven entries. Of the original Seven Wonders, only one—the Great Pyramid of Giza, the oldest of the ancient wonders—remains relatively intact. Based on a mark in an interior chamber naming the work gang and a reference to fourth dynasty Egyptian Pharaoh Khufu, Egyptologists believe that the pyramid was built as a tomb over a 10 to 20-year period concluding around 2560 BC.

The Colossus of Rhodes, the Lighthouse of Alexandria, the Mausoleum at Halicarnassus, the Temple of Artemis and the Statue of Zeus were all destroyed. The Hanging Gardens of Babylon is the only one whose location has not been definitively established, with speculation that they may not have existed at all.