（*)Anti/gonos *Gonata=s), son of Demetrius Poliorcetes and Phila (the daughter of Antipater), and grandson of Antigonus, king of Asia. [ANTIGONIDAE.] When his father Demetrius was driven out of Macedonia by Pyrrhus, in B. C. 287, and crossed over into Asia, Antigonus remained in Peloponnesus ; but he did not assume the title of king of Macedonia till after his father's death in Asia in B. C. 283.
It was some years, however, before he obtained possession of his paternal dominions. Pyrrhus was deprived of the kingdom by Lysimachus (B. C. 286); Lysimachus was succeeded by Seleucus (280), who was murdered by Ptolemy Ceraunus. Ceraunus shortly after fell in battle against the Gauls, and during the next three years there was a succession of claimants to the throne. Antigonus at last obtained possession of the kingdom in 277, notwithstanding the opposition of Antiochus, the son of Seleucus, who laid claim to the crown in virtue of his father's conquests.
But he withdrew
（*)Arximh/dhs), of Syracuse, the most famous of ancient mathematicians, was born B. C. 287, if the statement of Tzetzes, which makes him 75 years old at his death, be correct.
Of his family little is known. Plutarch calls him a relation of king Hiero; but Cicero (Tusc. Disp. 5.23), contrasting him apparently not with Dionysius (as Torelli suggests in order to avoid the contradiction), but with Plato and Archytas, says, " humilem homunculum a pulvere et radio excitabo."
At any rate, his actual condition in life does not seem to have been elevated (Silius Ital. 14.343), though he was certainly a friend, if not a kinsman, of Hiero.
A modern tradition makes him an ancestor of the Syracusan virgin martyr St. Lucy. (Rivaltus, in vit. Archim. Mazzuchelli, p. 6.)
In the early part of his life he travelled into Egypt, where he is said, on the authority of Proclus, to have studied under Conon the Samian, a mathematician and astronomer (mentioned by Virg. Eel. 3.40), who lived und