Even though the site is in German, English speakers may go here and click on the red arrow above the photo to view a slide show of 12 images related to the battle in the Teutoburg Forest. The magnifying icon gives you nice enlargements.
Wikimedia Commons has more:
Arminius, Railroad Station, Bad Homburg
Fire screen, etchings, section above left shows Arminius having Varus' head brought to King Marboduus, Christian Bernhard Rode, after 1781
Johannes Gehrts: Arminius' Farewell of Thusnelda, 1884
thusnelda in the triumph of germanicus (earlier blog entry)
Statue of a Barbarian prisoner, so-called 'Thusnelda' at Loggia dei Lanzi, Florence
Caspar David Friedrich: Old Heroes' Graves, Arminius, 1812
And a funny German song: Als die Römer frech geworden
