Adolphe Napoleon Didron, a French archaeologist, born in Hautevillers, department of Marne, March 13, 1806, died in Paris, Nov. 13, 1867. He travelled on foot through Normandy, examining all the remarkable mediaeval monuments. In 1835 he was appointed by Guizot secretary of the historical committee of arts and monuments, and wrote the four volumes of elaborate reports issued by that committee. In 1838 he delivered in the royal library a course of lectures on Christian iconography, after which he made a journey to Greece to compare the art of the Greek church with that of the West, and to obtain access to mediaeval manuscripts. On his return to Paris in 1840 he delivered another course of lectures, and in 1845 founded there an archaeological publishing house, and a manufactory of painted glass. He established in 1844, and edited until 1866, the Annates archeologiques, devoted particularly to the archaeology of the middle ages, in preparing which he was assisted by the principal archaeologists, architects, designers, and engravers of Europe. His most important publication is the Manuel d'iconographie chretienne grecque et latine (1845), of which an English translation was published in 1851.