These mysterious stone structures in Saudi Arabia are older than the pyramids – NBC News

Thousands of monumental structures built from walls of rock in Saudi Arabia are older than Egypt’s pyramids and the ancient stone circles of Britain, researchers say – making them perhaps the earliest ritual landscape ever identified.

A study published Thursday in the journal Antiquity shows that the mysterious structures dotted around the desert in northwestern Saudi Arabia – called “mustatils” from the Arabic word for “rectangle” – are about 7,000 years old. That’s much older than expected, and about 2,000 years older than either Stonehenge in England or the oldest Egyptian pyramid.

“We think of them as a monumental landscape,” said Melissa Kennedy, an archaeologist at the University of Western Australia in Perth and an author of the study. “We are talking about over 1,000 mustatils. These things are found over 200,000 square kilometers [77,000 square miles], and they’re all very similar in shape … so perhaps it’s the same ritual belief or understanding.”

The “head” of a mustatil consists of a larger wall of stones and contains a small niche or chamber; researchers have found animal bones in at least one of the chambers, which suggests it was used to make sacrificial animal offerings.AAKSA and Royal Commission for AlUla/Antiquity

“There must have been a great level of communication over a very big area, because how they were constructed was communicated to people,” lead author Hugh Thomas, an archaeologist at the same university, said.

The research is funded by the Royal Commission for AlUla, which has been established by the government of Saudi Arabia to preserve the heritage of the AlUla region in the northwest of the country, where many mustatils are found. 

Some of the ancient structures are more than 1,500 feet long, but comparatively narrow, and they’re often clustered together. They’re usually built on bedrock, often on rocky outcrops above the desert, but also in mountains and in relatively low-lying areas. 

The simplest mustatils were made by piling up rocks into low walls a few feet high to form long rectangles, with a thicker “head” wall at the highest end and a narrow entranceway on the opposite side. The researchers think they may have been built to guide a procession from one end to the other. But they also found many mustatils that were much more complex than they first thought, containing pillars, standing stones and smaller “cells” of rock walls. Kennedy and Thomas estimate one mustatil they surveyed was built by moving more than 12,000 tons of basalt stone – an arduous task that must have taken dozens of people months to complete.

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These mysterious stone structures in Saudi Arabia are older than the pyramids – NBC News

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