Ezra 6:2 , supposed to mean Ecbatana, a city of Media, inferior to none in the East but Babylon and Nineveh. It was surrounded by seven walls, of different heights and colors, and was a summer residence of the Persian kings after Cyrus. Travelers identify it with the modern Hamadan, in which many Jews still reside, and where they profess to point out the tomb of Mordecai and Esther.
Although written in 1859 by William Rand, this dictionary of the Bible from the American Tract Society is still relevant today.Wikipedia
Read More