OMAR, the successor of Abu-Bekr, and the second Caliph from 634 to 644; was at first a persecutor of the Faithful, but underwent in 615 a sudden conversion like Said, with a like result; was vizier of Abu-Bekr before he succeeded him; swept and subdued Syria, Persia, and Egypt with the sword in the name of Allah, but is accused of having burned the rich library of Alexandria on the plea that it contained books hostile to the faith of Islam; he was an austere man, and was assassinated by a Persian slave whose wrongs he refused to redress.

OMAR KHAYYAM, astronomer-poet of Persia, born at Naishapur, in Khorassan; lived in the later half of the 11th century, and died in the first quarter of the 12th; wrote a collection of poems which breathe an Epicurean spirit, and while they occupy themselves with serious problems of life, do so with careless sportiveness, intent he on the enjoyment of the sensuous pleasures of life, like an easy-going Epicurean.  The great problems of destiny don’t trouble the author, they are no concern of his, and the burden of his songs assuredly is, as his translator says, “If not ‘let us eat, let us drink, for to-morrow we die.’”

OMAR PASHA, general in the Turkish army, was born an Austrian, his proper name Michael Lattas, and educated at the military school of Thurn; guilty of a breach of discipline, he ran away to Bosnia, turned Mohammedan, and henceforth threw in his lot with the Turks; he became writing-master to the Ottoman heir, Abdul-Medjid, and on the succession of the latter in 1839 was made a colonel; he was military governor of Lebanon in 1842, won distinction in suppressing rebellions in Albania, Bosnia, and Kurdistan, but his chief services were rendered in the Russian War; he successfully defended Kalafat in 1853, entered Bucharest in 1854, and defeated 40,000 Russians next year at Eupatoria in the Crimea; his capture of Cetinje, Montenegro, in 1862 was a difficult feat (1806-1871).

O’MEARA, BARRY EDWARD, a surgeon, born in Ireland, who accompanied Napoleon to St. Helena, and became his physician, having been surgeon on board the Bellerophon when the emperor surrendered himself; is remembered as the author of “A Voice from St. Helena; or, Napoleon in Exile,” a book which from its charges against Sir Hudson Lowe created no small sensation on its appearance (1786-1836).

OMMIADES, an Arab dynasty of 14 caliphs which reigned at Damascus from 661 to 720; dethroned by the Abassides, they were under Abder-Rahman I. welcomed in Spain, and they established themselves in Cordova, where they ruled from 756 to 1031.

OMNIPRESENCE, an attribute of the Divine Being as all-present in every section of space and moment of time throughout the universe.

OMPHALE, a queen of Lydia, to whom Hercules was sold for three years for murdering Iphitus, and who so won his affection that he married her, and was content to spin her wool for her and wear the garments of a woman while she donned and wore his lion’s skin.