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Han & Xin · Cities & Technology

How a Rammed-Earth Wall Was Built: The Walls, Gates and Moat of Han Chang'an

146,000 people, 20,000 retainers, 145,000 more, thirty days at a time: in 190 BCE the wall of Chang'an was finished. Rammed earth, twelve gates with three passages each, one moat — text and trowel disagree.