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Twenty kilometers from the town of Dunhuang (敦煌)—a major crossroads on the ancient Silk Road—lie hundreds of Buddhist cave temples carved into cliffs bordering an endless expanse of sand dunes. Collectively known as the Mogao Caves (莫高窟), this complex represents one of the world’s greatest repositories of Buddhist art and culture. About a thousand years ago, during the period when Dunhuang was under the rule of the Western Xia state (西夏) and much of China was governed by the Song Dynasty (宋朝), one of these caves—containing approximately 60,000 manuscripts—was sealed and then forgotten for nearly 900 years. Accidentally rediscovered in 1900, this extraordinary time capsule has since been hailed as one of the most significant archaeological finds of the 20^th century. The cave is now designated Cave 17 and is commonly known as the Library Cave (藏经洞).

Dunhuang had flourished as a center of Buddhist worship for nearly a millennium before the Ming Dynasty (明朝) in the 14^th century. Facing repeated attacks from nomadic groups to the west, the Ming government constructed defensive fortifications at Jiayuguan (嘉峪关), the narrowest point along the Hexi Corridor (河西走廊), and defined it as the western border of the empire. Dunhuang, located some 300 kilometers farther west, was consequently marginalized, and its cave temples gradually fell into neglect. By the early 20^th century, a Daoist monk named Wang Yuanlu (王圆箓) had appointed himself caretaker of the Mogao Caves. It was during his efforts to maintain the site that he inadvertently discovered the Library Cave.

News of the discovery spread quickly, triggering a rush by archaeological explorers from Europe, Russia, North America, and Japan to reach Dunhuang. At the time, the Qing Dynasty (清朝, 1644—1912) was nearing collapse and showed little interest in safeguarding these cultural treasures. Beginning in 1907, Wang sold large portions of the manuscript collection to foreign expeditions. By 1910, when the Qing government finally ordered the remaining materials to be transferred to Beijing, only about one-fifth of the original cache remained.

The Dunhuang manuscripts (敦煌遗书, image below) do not constitute a deliberately curated archive, but rather a haphazard accumulation of texts spanning more than 600 years. Ranging from long scrolls to brief notes scribbled on single sheets or fragments of paper, the majority of the collection consists of Buddhist sutras and religious writings. The secular materials, however, are equally revealing. They include works on Chinese philosophy, history, and medicine, as well as administrative records from local government offices, merchants, and schools. Legal and personal documents—such as wills, divorce agreements, and contracts for the sale of land, grain, and even the services of servants and slaves—offer rare insight into everyday life. These texts reveal how land was measured and taxed, how populations were recorded, and how local economies functioned, adding remarkable detail and intimacy to standard historical narratives. Among the most celebrated items in the collection is a Chinese translation of the Diamond Sutra (金刚经), widely regarded as the oldest known printed book.