Diodorus the Periegete (Διόδωρος ὁ Περιηγητής) was a Hellenistic geographer active in the 4th or 3rd century BCE. The epithet “Periegete” identifies him as a writer of descriptive geographical guides. No details of his life or origins survive [1][2][3].

His sole known work is the Periegesis of the Inhabited World (Περιήγησις τῆς οἰκουμένης), a text now lost and preserved only in fragments cited by later authors [1][2][3].

Diodorus is a minor figure whose significance lies in his contribution to the Hellenistic genre of periegesis. His work served as a source for later geographers like Pomponius Mela and Marcianus of Heraclea, aiding the transmission of geographical knowledge from the Hellenistic period to the Roman world and late antiquity [1][2].

Sources 1. Oxford Research Encyclopedia of Classics: https://oxfordre.com/classics/view/10.1093/acrefore/9780199381135.001.0001/acrefore-9780199381135-e-2192 2. Perseus Digital Library, Catalog of Authors: http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0004:entry=diodorus-periegetes 3. ToposText: https://topostext.org/people/1410