Fortress built by Antiochus Epiphanes in the year 173 B.C. at Jerusalem, on an outlying spur of the Temple mount toward the south, where he placed a garrison, stored provisions, and kept armor. The Greek (I Macc. i. 33) reads "Acra," which has been translated as if it were not a proper name.
Josephus, B. J. v. 4, § 1; vi. 6, § 3; xii. 5, § 4;