SELEUCIDÆ, or the Syro-Macedonian era, is a computation of time, commencing from the establishment of the Seleucids (by Seleucus Nicator), a race of Greek kings, who reigned as successors of Alexander the Great in Syria, as the Ptolemies did in Egypt. This era we find expressed in the books of the Maccabees, and on a great number of Greek medals struck by the cities of Syria. The Jews call it the era of contracts, and the Arabs the era of the two horns. According to the best accounts, the first year of this era falls in 311 B.C., being twelve years after Alexander's death.