3,500-Year-Old Unfinished Obelisk Reveals Incredible Engineering of Ancient Egypt

Unfinished Obelisk - Aswan, Egypt

Lying as a sleeping giant in a bed of granite, the Unfinished Obelisk in Aswan, Egypt is an incredible look at the building methods of these monolithic monuments. It would have measured about 137 feet (42 meters) if completed and is estimated to weigh around 1,200 tons.  It’s thought that the female pharaoh Hatshepsut commissioned the work during the 18th dynasty, more than 3,500 years ago.

Just what are obelisks? These four-sided, tapered monuments were called tekhenu by the Ancient Egyptians, but we now know them as obelisks—taken from the Greek word obeliskos. Typically placed at the entrances of temples, they are the hallmark of Ancient Egyptian ingenuity and engineering. So beloved by successive civilizations, more than half of the remaining ancient obelisks actually reside outside of Egypt, having been especially prized by the Romans. In fact, 13 are located in Italy.

So what happened to the Aswan obelisk that left it tracked in bedrock? Perhaps they got a little greedy with their capabilities, as it would have been 1/3 larger than any previously erected obelisk had the work gone to completion. Instead, a huge crack appeared as it was being freed from the bedrock, causing it to lay abandoned. Now, it functions as an open-air museum that gives great insight into the construction techniques of Ancient Egypt.

Carving the monuments directly in the bedrock was a common technique, and stone balls were used by masons to pound out any imperfections until the surface was smooth. There are still examples of these Dolerite balls, on-site as Aswan. Harder than granite, the Dolerite wouldn’t crack or break after repeatedly pounding against the stone surface.

One of the more interesting aspects of the Unfinished Obelisk is that it allows us to see just how they would have liberated the mammoth structure from the bedrock had it not cracked. It sounds unbelievable, but wet wood was the answer. Workers carved small cavities in the stone, creating a line that is not unlike a perforated piece of paper. The slots were filled with sun dried wooden wedges. The wedges were then repeatedly soaked in water, and believe it or not, the expansion of this wood would cause the carved rock to break free from its home.

The Unfinished Obelisk is a more than 3,500-year-old monument from ancient Egypt that was abandoned when cracks formed in the granite.

Unfinished Obelisk - Aswan, Egypt

Image from 1904 by Travelers in the Middle East Archive (TIMEA). Photo: Wikipedia

An incredible feat of ancient construction, the site now functions as an open-air museum in Aswan.

Unfinished Obelisk - Aswan, Egypt

Photo: Wikipedia

Unfinished Obelisk - Aswan, Egypt

Photo: emel82

h/t: [reddit]

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