- Back to Medieval Source Book | ORB Main Page | Links to Other Medieval Sites | Medieval Sourcebook: Tacitus: Germania Tacitus, an important Roman historian, wrote the most detailed early description of the Germans at then end of the first century CE.. In doing so, be warned, he was commenting on the Rome of his own time, as much as on the German themselves. Note that although this is most of ...www.fordham.edu/halsall/source/tacitus1.html