Demosthenes (Greek: Δημοσθένης; 384–322 BC) was a prominent Greek statesman and orator of ancient Athens. His orations constitute the last significant expression of Athenian intellectual prowess and provide a thorough insight into the politics and culture of ancient Greece. The Alexandrian Canon compiled by Aristophanes of Byzantium and Aristarchus of Samothrace recognized Demosthenes as one of the 10 greatest Attic orators and logographers. Cicero acclaimed him as "the perfect orator," while Quintilian extolled him as lex orandi ("the standard of oratory") and that inter omnes unus excellat ("he stands alone among all the orators").
Demosthenes must have written down and put into circulation most of his orations. In the next generation after his death, texts of his speeches survived in at least two places: Athens and the Library of Alexandria (early-mid third century BC). During this period, Callimachus was responsible for producing the catalogue of all the volumes contained in the Library. Demosthenes' speeches were incorporated into the body of classical Greek literature that was preserved, catalogued and studied by scholars of the Hellenistic period. From then until the fourth century AD copies of his orations multiplied at a time when Demosthenes was deemed the most important writer in the rhetorical world and every serious student of rhetoric needed access to his writings. Texts of his speeches were in a relatively good position to survive the tense period from the sixth until the ninth century AD.
Scholars have recorded 258 Byzantine manuscripts of Demosthenes' speeches and 21 of extracts. Modern editions of these speeches are based on four of these manuscripts:
The authorship of many of the works attributed to Demosthenes have been disputed. Arnold Schaefer, for instance, accepted only 29 of Demosthenes' speeches as genuine.