The Fragmentum (annalium) chesnii or chesnianum, sometimes called the Annales Laureshamenses antiquiores, is a brief set of Reichsannalen describing the history of Francia during the years 768 to 790. It is named after André Duchesne (Andreas Chesneus), who first edited and published it in his book Historiae Francorum scriptores (1:21–23) in 1636. It has been re-edited by Georg Heinrich Pertz for the Monumenta Germaniae Historica, Scriptores I, 30–34 (Hanover: 1826).