Abstract
During the night of May 5, 1868, the canvas of Delacroix's mural in the dome of the Palais du Luxembourg library tore loose from the masonry to which it had been fixed twenty-four years before, and crashed to the floor.1 The task of supervising restoration and reinstallation was entrusted to Pierre Andrieu who, after 1847, had been Delacroix's chief assistant on the mural projects in the Louvre, the Hôtel de Ville, and Saint-Sulpice.2