Isaiah 23:14-15

14, 15. Tyre shall be forgotten seventy years Shall be of comparatively no account as an object for re-conquest. “Seventy years” is a compact series of decades, denoting at least a full long time; possibly, the figure here is a symbol for the period of a strong dynasty. Prophetic vision takes in things as wholes, be they as to periods longer or shorter. Historically there was nothing to hinder Tyre going on in her commerce, in unostentatious ways, under the Persian rule, till Alexander arose, some two hundred years later than Nebuchadnezzar. Alexander then attacked Tyre, but completed the ruin of her and her commerce more by establishing a great commercial rival, the city of Alexandria, in the western delta of the Nile, B.C. 332, than by his mere conquest of the city.