Nineveh plains (, , and modern , ; , ; ) is a region in
Iraq's
Nineveh Governorate to the north and east of the city
Mosul, from which it is also known as the
Plain of Mosul. It was formerly known as the
Plain of Sanjar or
Sinjar from its
major medieval settlement. It was the location of
al-Khwarizmi's determination of a
degree during the reign of the
caliph al-Mamun. The area also includes the ruins of the ancient
Assyrian cities of
Nineveh,
Nimrud, and
Dur-Sharrukin as well as numerous ancient religious sites such as
Mar Mattai Monastery,
Rabban Hormizd Monastery, the Tomb of
Nahum, and
Lalish.