Hesse | Otto von Bismarck | Hermann Hesse | Landgraviate of Hesse-Darmstadt | Grand Duchy of Hesse | Otto | Waldeck, Hesse | Landgraviate of Hesse-Kassel | Otto III | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Otto Preminger | Frankenberg, Hesse | Nidda, Hesse | Louis IV, Landgrave of Hesse-Marburg | Rhenish Hesse | Otto II | Otto Dix | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Hesse-Nassau | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. | Landgraviate of Hesse | Eva Hesse | Electorate of Hesse |
Other valuable treatises and memoirs have been written by Strauch (1849), Jellett (1850), Otto Hesse (1857), Alfred Clebsch (1858), and Carll (1885), but perhaps the most important work of the century is that of Weierstrass.