Context: In 821/822 CE Tibet and China signed a peace treaty. A bilingual account of this treaty, including details of the borders between the two countries, is inscribed on a stone pillar which stands outside the Jokhang temple in Lhasa. Tibet continued as a Central Asian empire until the mid-9th century, when a civil war over succession led to the collapse of imperial Tibet. The period that followed is known traditionally as the Era of Fragmentation, when political control over Tibet became divided between regional warlords and tribes with no dominant centralized authority.

Question: When did Tibet and China sign a peace treaty?
Answer: 821/822 CE

Question: Where does a bilingual account of Tibet and China's peace treaty exist?
Answer: Jokhang temple in Lhasa

Question: When did a civil war over succession lead to the collapse of imperial Tibet?
Answer: mid-9th century

Question: What followed the collapse of imperial Tibet?
Answer: Era of Fragmentation

Question: What was divided between warlords and tribes with no dominant centralized authority?
Answer: political control over Tibet

Question: Who signed a peace treaty in 812/822 CE?
Answer: Unanswerable

Question: What stands outside the Lhasa temple in Jokhang?
Answer: Unanswerable

Question: What did a civil war in the mid-8th century lead to?
Answer: Unanswerable

Question: What did the Era of Succession follow?
Answer: Unanswerable