The LARGEST City on Earth | Life in Song Dynasty China | History for Sleep

Fall asleep to the true story of the largest city on Earth. A deeply researched sleep documentary on Song Dynasty China — from a single rice paddy to the fall of an empire. A thousand years ago, the city of Kaifeng held roughly a million people — while London held about fifteen thousand. This is the story of how that happened: a rice revolution that fed an empire, the world's first paper currency, an examination system that cracked open a rigid social order, and a Song Dynasty clock tower more advanced than anything Europe would build for centuries. And it's the story of how it all ended — a fall from grace, a desperate war fought on rivers and marshland, and a seven-year-old emperor carried into the sea. Told slowly and gently, designed to help you drift off to sleep — or to simply learn something new if you're still awake. In this episode: 🌾 The Champa rice revolution that fed a hundred million people 🏙️ Kaifeng and Hangzhou — the largest cities on Earth 💴 Jiaozi — the world's first government-issued paper money 📜 The examination system, and the real, complicated story of social mobility it created 🕐 Su Song's astronomical clock tower — a five-story marvel lost to conquest ⚔️ The fall of the Song Dynasty, ending at the Battle of Yamen, 1279 On sourcing: This documentary is built on real historical research, drawing on primary records and academic sources, including the Along the River During the Qingming Festival scroll (Palace Museum, Beijing), and real museum photography of surviving Song-era porcelain and artifacts. Some visuals in this video are AI-assisted illustrations, created to depict historical scenes and objects for which no surviving imagery exists, in a style consistent with traditional Chinese ink-wash painting. 🌙 New sleep documentaries every week — subscribe for more slow, real history to fall asleep to. 0:00:00 Intro 0:01:47 The Rice Revolution That Fed an Empire 0:11:40 The Grand Canal and the Birth of Paper Money 0:21:35 Kaifeng: The Largest City on Earth 0:40:14 The Exam That Could Change a Family's Fate 0:55:13 Shen Kuo and the Lost Clock Tower 1:17:07 The Fall of the Song Dynasty 1:36:47 Legacy of a Lost Empire