At Achmetha. — That is, Ecbatana, the Median capital of Cyrus. It is probable that the original roll of parchment had been destroyed at Babylon by Smerdis, but a copy of it was found here, probably in a Chaldean transcript.
Related Commentaries of Ezra 6:2
Ezra 6:2
2 And there was found at Achmetha,b in the palace that is in the province of the Medes, a roll, and therein was a record thus written: