About Tibetan Annals

The Tibetan Annals, or Old Tibetan Annals (OTA), are composed of two manuscripts written in Old Tibetan language found in the early 20th century in the "hidden library", the Mogao Grottoes near Dunhuang in northwestern Gansu province, Western China, which is believed to have been sealed in the 11th century CE. They form Tibet's earliest extant history.
Abbot Wang Yuanlu, discoverer of the hidden Library Cave

The Tibetan Dunhuang manuscripts

Dunhuang manuscripts refer to a wide variety of religious and secular documents in Chinese and other languages that were discovered at the Mogao of Dunhuang, China, during the 20th century. The majority of the surviving texts come from a large cache of documents produced between the late 4th and early 11th centuries which had been sealed in the so-called 'Library Cave' at some point in the early 11th century. The Library Cave was .