Mesopotamia Archaeology Festival in Babylon/Ur/Nineveh
Iraq has a real, revived flagship heritage festival, the Babylon International Festival of World Cultures and Arts, first launched in 1985 and revived in 2021 after an 18-year hiatus. A festival specifically named 'Mesopotamia Archaeology Festival' spanning Babylon, Ur and Nineveh together was not independently confirmed as one distinct event.
Iraq's claim to being the cradle of Mesopotamian civilization is not in question, and its festival calendar has, at times, tried to match that claim.