This is sort of a holiday for me. I do like to mark it out. And, so, once again… The picture to the right of this text is from a Chinese edition of the Vajracchedika Prajnaparamita Sutra, the Diamond Sutra. According to the date on the title page it was published on this day in 868. This makes it the oldest known printed book. Now if you’re concerned, this doesn’t take a lot away from Mr Gutenberg’s critical innovation of... Read more