The palace dates back to the 7th Century BCE and was built by the Assyrian King Sennacherib, as reported by Basnews and covered by Entekhab news website.
The extremist group recently released pictures of the palace being bulldozed by the militants.
After the fall of Mosul in the hands of ISIS in mid-2014, the militants started to flatten historical and religious sites. Ever since, they have destroyed and looted numerous ancient locations.
