A stone monument dating to 823 and setting out the terms of peace and borders between Tibet and China arrived at in 821 can still be seen in front of the Jokhang temple in Barkhor Square in Lhasa. The monument, a treaty of friendship, is written in both Tibetan and Chinese. The inscribed pillar was erected by the Chinese in 1793 during a smallpox epidemic. It records the Sino-Tibetan treaty of 822 concluded by King Ralpacan and includes the following inscription: "Tibet and China shall abide by the frontiers of which they are now in occupation. All to the east is the country of Great China; and all to the west is, without question, the country of Great Tibet. Henceforth on neither side shall there be waging of war nor seizing of territory. If any person incurs suspicion he shall be arrested; his business shall be inquired into and he shall be escorted back." The inscription also carried advice on hygiene measures to prevent smallpox.