How to cut down an obelisk? On Sunday, an egyptologist, has issued a small tutorial on Twitter, explaining in detail how to remove this type of structure. And his record has not gone unnoticed. A few hours later, the obelisk of the Monument to the soldiers and sailors confederate of Birmingham (Alabama) was the subject of a dismantling of the demonstrators came to protest against the police violence after the death of George Floyd.

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The instructions of Sarah Parcak, a professor at the University of Alabama at Birmingham, were clear. At least 40 people gathered in two groups, were asked about their position on each side of the obelisk, and pull on a rope connected to a chain attached to the building. “The goal is to create a movement of balance from front to back to remove the obelisk from its base”, called it in a tweet, accompanying his explanation with a little diagram.