The Germania (Latin: De Origine et situ Germanorum), is an extended account of the Germanic peoples encountered by the Romans on the northern frontiers of their empire. Completed by Tacitus in around AD 98,the work describes the land of Germany and the customs of the Germans as a whole, before discussing individual tribes in turn, dividing them into three main groups, the Ingaevones, the Herminones and the Istaevones.
Tacitus contrasted the simplicity and liberty of the Germans with the decadence of Rome, in an influential example of the rhetorical trope that would come to be known as the myth of the noble savage.
Bibliotheca Augustana: De Origine et Situ Germanorum - Latin text, HTML format.
Internet Archive: The Agricola and Germania, translated by R.B. Townshend. Multiple formats.
The Latin Library: De Origine et Situ Germanorum - Latin text, HTML format.
Medieval History Sourcebook: Germania, translated by Thomas Gordon. HTML format.
Perseus: De Origine et Situ Germanorum, edited by Henry Furneaux - Latin text, HTML and XML formats.
Perseus: Germany and its Tribes, translated by Alfred John Church and William Jackson Brodribb. HTML and XML formats.
Poetry in Translation: The Agricola and Germania, translated by A.S. Kline (2015). Multiple formats.
Sacred-texts: Germany - Latin and English side by side. HTML format.
Wikisource: The Situation of the Germans, translated by Alfred John Church and William Jackson Brodribb, 1876. Online, downloadable as PDF/MOBI/EPUB.
Classical Wisdom Weekly: Tacitus' Germania - The Mythology Behind German Nationalism, by Benjamin Welton.
Librivox: Tacitus' Germania - public domain audiobook.
New York Times: The Idea of Germany - from Tacitus to Hitler, by Cullen Murphy.
Tertullian.org: Tacitus and his Manuscripts.
The Great conversation: further reading at Tom's Learning Notes.
Caesar: The Gallic War - includes an account of the first Roman incursion into Germany.
Pliny the Elder: Natural History - includes some material on the Germans in Book IV. Pliny's lost writings on the German Wars were probably a major influence on his contemporary, Tacitus.
Tacitus: The Annals - From the Death of Augustus to Nero.
Tacitus: The Histories - the Year of the Four Emperors and the rise of the Flavian Dynasty.
Tacitus: The Agricola.
Latin Resources: Online materials for learning Latin.