Appian?s Celtic History, which deals with the military conflicts between Romans and Celts from the 4th cent. BC until the conquest of Gaul by Caesar, is despite its fragmentary state a valuable source, as it contains various information documented nowhere else or significantly different to those traditions attested by other authors. In addition to the Greek text and a German translation of the individual fragments, the present publication offers above all the first detailed commentary, which makes this little regarded source accessible.