Charles Léopold Louandre, born May 15, 1812 in Abbeville and died July 31, 1882 in Abbeville, is a French historian and bibliographer. Like his father, the historian François César Louandre (1787 – 1862), he was born in Abbeville. At a very young age, he left to study in Paris, where he received a degree in literature. He collaborated on various collections of the time before joining the Revue des deux Mondes in 1842, where he remained until 1854. Interested in contemporary history and archaeology, his articles, sometimes written in collaboration with Charles Labitte, and inserted in this review and in the Revue de Paris, end up highlighting it. After leaving these two magazines, he published with Charpentier, in the Le Magasin de livre collection, historical scholarly works on public nutrition under the Ancien Régime, on the nobility, on the origin of royalty, etc. . In 1855, he became editor-in-chief of the Journal général de l’instruction publique, as well as the Journal des teachers. He was also part of the historical work committee from 1876 to 18821. He joined the group of scholars, composed, among others, of Félix Bourquelot and Ludovic Lalanne, who helped Augustin Thierry, who had become blind and paralyzed, to finish writing the Collection of monuments of the history of the Third Estate. When Thierry died in 1856, he continued and completed this task with Bourquelot. With the latter, Louandre continues the writing of literary France, which Quérard had abandoned in the second volume. Both of them wrote volumes II, III and IV. Bourquelot will finish volumes V and VI with Alfred Maury. He is buried with his father in the Chapelle d’Abbeville cemetery.