DION CHRYSOSTOMUS (Dion with the golden, or eloquent, mouth), a celebrated Greek rhetorician, born at Prusa, in Bithynia, about the middle of the 1st century; inclined to the Platonic and Stoic philosophies; came to Rome, and was received with honour by Nerva and Trajan; is famous as an orator and as a writer of pure Attic Greek.

DION OF SYRACUSE, a pupil of Plato, and an austere man; was from his austerity obnoxious to his pleasure-loving nephew, Dionysius the Younger; subjected to banishment; went to Athens; learned his estates had been confiscated, and his wife given to another; took up arms, drove his nephew from the throne, usurped his place, and was assassinated in 353 B.C., the citizens finding that in getting rid of one tyrant they had but saddled themselves with another, and greater.

DIONE, a Greek goddess of the earlier mythology; figures as the wife of the Dodonian Zeus; drops into subordinate place after his nuptials with Hera.

DIONYSIUS THE ELDER, tyrant of Syracuse from 406 to 367 B.C.; at first a private citizen; early took interest in public affairs, and played a part in them; entered the army, and rose to be head of the State; subdued the other cities of Sicily, and declared war against Carthage; was attacked by the Carthaginians, and defeated them three times over; concluded a treaty of peace with them, and spent the rest of his reign, some 20 years, in maintaining and extending his territory; was distinguished, it is said, as he might well be, both as a poet and a philosopher; tradition represents him as in perpetual terror of his life, and taking every precaution to guard it from attack.

DIONYSIUS THE YOUNGER, tyrant of Syracuse, son of the preceding, succeeded him in 367 B.C. at the age of thirty; had never taken part in public affairs; was given over to vicious indulgences, and proved incapable of amendment, though DION (q. v.) tried hard to reform him; was unpopular with the citizens, who with the help of Dion, whom he had banished, drove him from the throne; returning after 10 years, was once more expelled by Timoleon; betook himself to Corinth, where he associated himself with low people, and supported himself by keeping a school.

DIONYSIUS OF ALEXANDRIA, patriarch from 348, a disciple of Origen, and his most illustrious pupil; a firm but judicious defender of the faith against the heretics of the time, in particular the Sabellians and the Chiliasts; d. 264.

DIONYSIUS, ST., THE AREOPAGITE (i. e. judge of the Areopagus), according to Acts xvii. 34, a convert of St. Paul’s; became bishop of Athens, and died a martyr in 95; was long regarded as the father of mysticism in the Christian Church, on the false assumption that he was the author of writings of a much later date imbued with a pantheistic idea of God and the universe.

DIONYSIUS OF HALICARNASSUS, a Greek historian and rhetorician of the age of Augustus; came to Italy in 29 B.C., and spent 27 years in Rome, where he died; devoted himself to the study of the Roman republic, its history and its people, and recorded the result in his “Archaeologia,” written in Greek, which brings down the narrative to 264 B.C.; it consisted of 20 books, of which only 9 have come down to us entire; he is the author of works in criticism of the orators, poets, and historians of Greece.