A Dictionary of Greek and Roman biography and mythology. By various writers. Ed. by William Smith. Illustrated by numerous engravings on wood.

-LEO. LEO.'745
afterwards archbishop of Mytilene. He wrote': 1. 38 of the Latin version of Fr. Barocius, fol. Padua,'EJy7prits Ei 7sd 7rEpl'punwveias'ApLoroe'Aovu, 1560), and who gave considerably greater accuracy
Commelentarius in Aristotelis De Interpretatione Li- to geometrical science, especially by showing how
bruinm. This commentary was published by Aldus, to distinguish problems which admit of solution
fol. Venice, 1503, with the commentary of Ammo- from those which cannot be solved. There is,
nius, from which Leo borrowed very largely, and however, a chronological objection to the identifithe paraphrase of Psellus on the same book of cation of Leo, the friend of Alcmaeon, who lived
Aristotle, and the commentary of Ammonius on in the sixth century B. c., with Leo the GeoAristotle's Categoriae s. Praedicamenta. In the metrician, who was later than Leodamas of Thasos,
Latin title of this edition the author is called by a and Archytas of Tarentum i(Proclus, 1. c.), who
misprint, Margentinus. A Latin version of Leo's belonged to the end of the fifth century B. C.:
commentary, by J. B. Rasarius, has been repeatedly and it is uncertain whether Leo of Metapontum is
printed with the Latin version of Ammonius. not different from both. (Fabric. Bibl. Graec.vol.
Another Latin version by lHieronymus Leustrius i. p. 850, vol. vii. p. 718.)
has also been printed. 2.'EET17yrcLs eGI Tdr 7rporepa 21. Of MYTILENE. [No. 17.]
dvccAVTKCd 6oL'AproTsE'Aouv, Commentaries in 22. PHILOSOPHUS. [No. 29.]
Priora Analytica Aristotelis. This was printed 23. P-RIPATETICUS. [No. 17.J
with the commentary of Joannes Philoponus on the 24. Of PELLA. [No. 3.]
same work, by Trincavellus, fol. Venice, 1536; 25. PYTHAGORICUS. [No. 20.]
and a Latin version of it by Rasarius has been re- 26. RHETOR. [Nos. 4 and 7.]
peatedly printed, either separately, or with other 27. SAPIENS. [Lao VI. emperor.]
commentaries on Aristotle. The following works 28. STYPIOTA or STYPPA (Tv7rTrjs), or STYPA
in MS. are ascribed, but with doubtful correctness, (urv7rjs), patriarch of Constantinople in the twelfth
to Leo Magentenus: 3. Commentarius in Cate- century. His patriarchate extendedfrom A. D. 1134
yorias Aristotelis, is extant in the King's Library to 1143 (Fabric. Bibl. Graec. vol. vii. p. 721, vol.
at Paris. 4.'Ap-ro-Te'Aovs aOlCrTCKWv 4Ae'yXW, xi. p. 666). He died just about the time of the acipy7verla, Eapositio Aristotelis De Sophisticis Elen- cession of the Byzantine emperor Manuel Comnenus,
chis: and 5.'ApleTrorehovs7rep seO7ropfas'poTdosoov. who appointed as Leo's successor Michael Curcuas,
These two works are mentioned by. Montfaucon a monk of Oxeia, by whom he was himself crowned.
(Bibl. Coislin. p. 225). The -latter is, perhaps, not (Nicetas Choniat. De Manuele Comneno, i. 2.) A
a distinct work, but a portion of No. 1. In the decree of Leo on the lawfulness of certain marMS. the author is* called Leontius Magentenus. riages, is given in the Jus Orientale of Bonefidius
6. Commentarius in Isagogen. s. Quinque Voces Por- (Oeruol'APXLepaTlKoI, Sanction. Pontfic. p. 59)
pk/yrii. Buhle doubts if this work, which isin the and in the Jus Graeco-Romannum of Leunclavius
Medicean library at Florence (Bandini, Catalog. (Lib. iii. vol. i. p. 217). He is often cited by
Codd. Laur. 1Medic. vol: iii. p. 239), is correctly Nicolaus Comnenus Papadopoli. (Fabric. 11. cc.)
ascribed to Magentenus. In the catalogue of the 29. Of THESSALONICA, an eminent Byzantine
MSS. in the king's library at Paris (vol. ii. pp. 410, philosopher and ecclesiastic of the ninth century.
421), two MSS. Nos. mdcccxlv. and mcmxxviii., Of the time or place of his birth nothing is
contain Scholia on the Cdteyoriae, the Analytica known. He was the kinsman of the iconoclast
Priora et Posteriora, and the Topica of Aristotle, Joannes (or as his enemies called him, on account
and on the Isaqgoge of Porphyry, by MAGNENTIUS. of his obnoxious sentiments, Jannes), who was of
Buhle conjectures, with probability, that Magnen- the illustrious family of the Morocharzamii or Motius is a corruption of Magentenus or Magentinus: rochardanii, tutor of the emperor Theophilus, and
if so, and the works are assigned to their real author, patriarch of Constantinople, from about A. D. 832
we must add the commentaries on the Topica and -842. (Theoph. Contin. iv. 26, comp. c. 6; and
the Analytica Posteriora to the works already men- Symeon Magister,.De Michaele et Thleodora, c.
tioned. Nicolaus Comnenus Papadopoli speaks of 2.) Leo was characterized by his devotion to
many other works of Leo, but his authority is of learning: he studied grammar and poetry " while
little value. (Fabric. Bibl. Graec. vol. iii. pp. 210, staying' (tarppigwy) at Constantinople," an ex213, 215, 218, 498, vii. 717, viii. 143, xii. 208; pression which seems to indicate that he was not a
Montfaucon, I. c. and p. 219; Buhle, Opera Aris- native of that city; and rhetoric, philosophy, and
totelis, vol. i. pp. 165, 305, 306, ed. Bipont; Cata- arithmetic, under Michael Psellus, in the island of
log. MStor. Biblioth. Regiae, fol. Paris, 1740, 1. c.) Andros. He visited the monasteries in the adjacent
18. MALE'iNUS (MaAetios), governor of the parts of continental Greece, examining and using
towns of Hierax, Stylus and others, in the middle their libraries, and studying and meditating upon
of the twelfth century. A decree of his with a the volumes obtained from them, amid the solitude
Latin version is given by Montfaucon, Palaeogra- of the mountains. Having thus acquired a great
ph/ia Graeca, p. 410, &c. store of knowledge, not only in the sciences above
19. MEDICUS. [No. 29.] mentioned, but in geometry, astronomy, including
20. Of METAPONTUM. Iamblichus (Pythag. Vit. astrology, and music, he again visited Constanti -
c. 36) mentions a Pythagorean philosopher of this nople, and imparted his intellectual stores to those
name and place, but without giving any further who resorted to him for instruction. (Theophan.
particulars, or assigning to him any date. It is Continuat. iv. 29; Cedrenus, Compendium, p. 547,
conjectured that he is the Leo to whom Alcmaeon &c., ed. Paris, vol. ii. p. 165, &c., ed. Bonin.)
of Crotona [ALCMAEON] dedicated his A6yor Neither his learning, however, nor his connexions
pvu,6'os, or work on natural philosophy (Diog. sufficed to raise him from obscurity, until he became,
Laert. viii. 83). Fabricius also proposes to iden- by a remarkable accident, known to the emperor
tify him with the Leo, son of Neoclis, whose Theophilus. A pupil of Leo, whom he had in-.rocXea, Elementa sc. Geometrica are mentioned structed in geometry, accepted the office of secretary
by Proclus (Commnent. it Euclid. Lib. ii. c. 4. p. to a military officer, during the war between the