The earliest and largest encyclopedia in the world is China's Yongle Dadian (written in 1403- 1408), with 22,937 volumes and 1 1095 volumes compiled by 2,000 scholars. The most extensive encyclopedia in the world is Encyclopedia Britannica, with 30 volumes, 33 14 1 page and 43 million words. The book with the largest number of pages in the world is China18th century's Sikuquanshu, which is divided into four parts: classics, history, books and collections, with 346 1 volume, more than 36,000 subpackages and 853,456 pages.