May 20, 2026 · 9:01 AM
The Great Wall of China: How 300,000 Workers Built History's Longest Fortress
Emperor Qin conscripted 300,000 soldiers to begin it, Ming emperors extended it for 200 years, and builders mixed sticky rice into mortar that still outperforms modern cement — the Great Wall is not just the world's longest structure, it's also one of history's most extraordinary engineering feats.
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