Ezra 6:1-2

Babylon : a country of Babylon in lower Mesopotamia
(32° 32´, 44° 25´); (32° 32´, 44° 25´); (32° 32´, 44° 25´); (30° 57´, 46° 6´)

Babylonia : a region in lower Mesopotamia where the Chaldaeans lived
(32° 32´, 44° 25´); (32° 32´, 44° 25´); (32° 32´, 44° 25´); (30° 57´, 46° 6´)

Darius : king of Persia after Cyrus and Artaxerxes Smerdis; Darius I,son of Ahasuerus; Darius II the Mede,king of Persia after Darius II; Darius III the Persian

Ecbatana : a town; capital of the Babylonian province of Media
(34° 47´, 48° 30´)