Tomba Campana on Monte Michele discovered 1842–1843 by Giovanni Pietro Campana dates to the end of the VIIth century contains the one of the oldest known Etruscan frescoes. Gorge Dennis diecribed the tomb in his work The Cities and Cemeteries of Etruria in 1848.
- George Dennis, The Cities and Cemeteries of Etruria, London, 1848.Chapter II. Veii. — The Cemetery. - http://penelope.uchicago.edu/Thayer/E/Gazetteer/Places/Europe/Italy/_Periods/Roman/Archaic/Etruscan/_Texts/DENETR*/2.html
- Alexander Crawford Lindsay Crawford: Etruscan inscriptions analysed, John Murray, London 1872, p. 36