Dijian tushuo (帝鑑圖說; The Emperor's Mirror, Illustrated and Discussed) is a book compiled by Zhang Juzheng (張居正, 1525-1582), a great scholar during the late period of the Ming Dynasty of China. The book was made for the education of Wanli Emperor (萬歷帝, r.1572-1620), who rose to the throne at an early age. It contains 117 stories about the virtuous and evil deeds of previous emperors, complete with illustrations and relevant articles. After its presentation to the emperor in 1572, several editions of the book were produced by the end of the nineteenth century, and copies were distributed to neighboring countries like Korea and Japan and even to France via Jesuit missionaries. There are copies of more than twelve extant woodblock-printed and lithographic editions in East Asia, as well as copies reprinted with copper plates in France. Also, copies of the book with color illustrations remain in China and France. In Korea, colored illustrations of Dijian tushuo are kept under different titles such as Gunwang jwaumyeong (君王左右銘; The King's Motto) and Dohae yeokdae gungam (圖解歷代君鑑; The Mirror of Rulers throughout the Ages, An Illustrated Explanation) at the Gyeonggi Provincial Museum and the Jangseogak, the archive of the Academy of Korean Studies, respectively.<br/>In China, Dijian tushuo formed part of the education of the crown princes during the Ming and Qing Dynasties. More than eight different editions were made by the flourishing commercial publication industry during the two dynasties. In Joseon royal court, the book was recognized as one of the didactic books for the discipline of kingship. As for Japan, the shoguns of the Edo Bakufu used the book to advertise themselves as ideal rulers or to make Chinese royal palace genre paintings as an exotic hobby. Isidore Stanislas Henri Helman (1743~1809), a French engraver, made reprinted copies of the book amid Chinoiseries popularized in eighteenth-century France. The French edition reflects not only the public criticism of King Louis XVI and Marie Antoinette but also Helman’s implicit intention to receive financial support from Marie Louise Josephin de Savoie and the Count of Provence (later Louis XVIII), first in line to the throne at the time.<br/>Dijian tushuo was adopted in various countries in East Asia and Europe between the end of the sixteenth century and the early twentieth century, although the way it was used differed from country to country depending on their respective political, social, and cultural situations. However, all these countries had one thing in common– they had future rulers read the book. Perhaps, the fact that it was written for the education of the crown princes of China served as the stimulus for leaders and intellectuals alike. Studies on the ways in which books like Dijian tushuo were distributed as an aggregation of knowledge, information, and culture are thought to be significant and useful in identifying certain characteristics shared by diverse countries and in shedding light on differences in their political and social backgrounds and their art history.