Anonymous 11/15/2023 10:22:00 No. 517 0b17ab [Reply] report Jingangjing jpg (10.38 MB, 4917x3438) Front line of the Chinese Diamond SÅ«tra, printed in the 9th year of the Xiantong era of the Tang dynasty, i.e. 868 CE, the oldest known dated printed book in the world. British Library.