A City BIGGER Than London Existed in America in 1100 AD - And Nobody Knows Who Built It

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How do you lose a city bigger than medieval London… and almost forget it ever existed?

In this Sleepy Time History deep dive, we explore Cahokia: the mysterious pre-Columbian metropolis that rose near present-day St. Louis around 1100 AD. Bigger than London, built without stone, and aligned to the sky, Cahokia was the center of a massive Mississippian world that stretched from the Great Lakes to the Gulf Coast.

We’ll walk through what archaeology actually tells us: how the city exploded in size, how its enormous earth mounds and Woodhenge were engineered, what everyday life looked like in its neighborhoods, and how farmers, traders, and rulers kept this urban machine running. We’ll also examine human sacrifice, fortifications, religion, and the leading theories for why Cahokia declined—and why people still say “nobody knows who built it.”

If you’re curious about ancient America, lost cities, and how Cahokia really compares to medieval London, this calm, story-driven exploration is for you.

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Chapters: 00:00 Intro/Hook - The “Bigger Than London” City and the Mystery That Isn’t Supposed to Exist 03:50 1) Before the Metropolis - The Mississippi World Before 1000 AD 13:32 2) Discovery, Erasure, and Misinterpretation - How Cahokia Was (Not) Remembered 22:17 3) The Big Bang of Cahokia - The ‘Big Bang’ Growth Around 1050 AD 30:07 4) A City of Earth - Monks Mound and Engineering Without Stone 39:09 5) The Grand Plan - Plazas, Alignments, and the Logic of Urban Design 48:47 6) Woodhenge - Timekeeping, Ceremony, and the Sky 56:00 7) Life in the Neighborhoods - Houses, Food, and Daily Rhythms 1:03:21 8) The Economy That Fed a City - Fields, Storage, and Risk 1:12:34 9) Trade and Reach - From the Great Lakes to the Gulf 1:22:39 10) Power, Elites, and Governance - Who Was Actually in Charge? 1:29:44 11) Sacred Worlds and Symbols - The Mississippian Ideological Toolkit 1:37:27 12) Violence, Sacrifice, and Social Stress - What the Darker Evidence Suggests 1:44:51 13) The Palisades and the ‘Fortified City’ Question 1:53:40 14) Cahokia’s Colonies and Cultural Ripple Effects 2:02:30 15) The Peak and the Turning Point - When the Machine Starts to Strain 2:11:15 16) Why Cahokia Declined - The Leading Explanations and Their Evidence 2:21:14 17) ‘Nobody Knows Who Built It’ - Untangling Names, Nations, and Identity 2:28:46 18) Cahokia vs Medieval London - What Comparisons Reveal (and Distort) 2:35:32 Conclusion - What We Know, What We Don’t, and Why the Mystery Matters

Sources: • Ancient Cahokia and the Mississippians — Timothy R. Pauketat

• Cahokia: Ancient America’s Great City on the Mississippi — Timothy R. Pauketat

• The Cahokia Chiefdom: The Archaeology of a Mississippian Society — George R. Milner

• Cahokia and the Hinterlands: Middle Mississippian Cultures of the Midwest — Thomas E. Emerson and R. Barry Lewis, editors

• Cahokia’s Complexities: Ceremonies and Politics of the First Mississippian Farmers — Susan M. Alt

Note on Process & Accuracy: Every story on this channel begins with a deep respect for history. We act as directors and editors, using AI to