People across the region joined services marking the occasion.
Love has returned to the streets of Mosul for the first time in three years after Iraqi forces drove out ISIL extremists in 2017.
Officials in Mosul warn that a failure to reconstruct Mosul after being obliterated in the battle to defeat ISIL could result in the rebirth of terrorism.
After nine months of continued conflict, work has begun to rebuild the Iraqi city of Mosul. Many of the residential districts have been heavily damaged, if not completely flattened.
Women can now be seen wearing bright clothes without face veils in post Islamic State Mosul since restrictions on them were lifted.
Mosul needs an urgent rebuilding plan
Videos purporting to show the murder of suspected ISIL fighters at the hands of their militia and security forces captors have emerged on social media.
Iraqi forces conduct 'clearing operations' to remove jihadists holed-up in Mosul Old City
A look at how the nine-month battle has left Iraq's second city.
Amnesty International accuses all sides in battle for Mosul of committing possible war crimes against civilians
Displaced Iraqis mull returning home to Mosul
Thousands of civilians were killed in the battle which has left large parts of the city in ruins
The last remaining militants have been cleared from the city, a day after it was recaptured by the Iraqi army.
Iraq: Mosul civilians flee
Iraq's prime minister is expected to travel to Mosul to declare victory over ISIL.
Civilians and security forces expressed joy as fresh advances were announced
Iraqi authorities believe victory in the city is imminent and are planning a week of nationwide celebrations
Aid workers are reporting higher levels of malnutrition as desperate families flee ISIL