The Siku Quanshu, also known as the Complete Library of the Four Treasuries, was the largest collection of books in Chinese history with 36,381 volumes (册, Cè), 79,337 manuscript rolls (卷, Juàn), 2.3 million pages and about 997 million words. The complete encyclopedia contains an annotated catalogue of 10,680 titles along with a compendiums of 3,593 titles. The Complete Library of the Four Treasuries ended up even longer than the Ming dynasty's Yongle Encyclopedia of 1403, which had been China's largest encyclopedia until then. A complete copy of the Complete Library of the Four Treasuries are held with each of the following: the National Library of China in Beijing, the National Palace Museum in Taipei, the Gansu Library in Lanzhou, and the Zhejiang Library in Hangzhou. Source: Wikipedia (en)