Fragments of an ancient Greek text telling of an invasion of Greece by the Goths during the third century A.D. have been discovered in the Austrian National Library. The text includes a battle fought at the pass of Thermopylae. Researchers used spectral imaging to enhance the fragments, making it possible to read them. The analysis suggests the fragments were copied in the 11th century A.D. and are from a text that was written in the third-century A.D. by an Athens writer named Dexippus.