The mosque's destruction came three days after government forces launched an assault on the Old City.
Mosul: The Iraqi military on Thursday announced the recapture of the iconic Mosul mosque where jihadist chief Abu Bakr al-Baghdadi made his only public appearance, calling on Muslims to obey him.
The announcement of the recapture of the mosque -- which the Islamic State group blew up last week as Iraqi forces closed in -- comes three years to the day after the jihadists declared a "caliphate" straddling Iraq and Syria.
"Counter-Terrorism Service forces control the Nuri mosque and Al-Hadba (minaret)," the Joint Operations Command said in a statement.
After a senior special forces commander said the mosque had not in fact been retaken, the operations command clarified that it meant Iraqi forces had isolated the area and were "advancing toward the completion of the goals."
The mosque and its famed Al-Hadba (hunchback) leaning minaret were Mosul landmarks and also held major significance in the history of IS rule in Iraq.
Iraqiya state TV carried a banner on Thursday announcing the "fall of the mythical state" -- a play in Arabic on the IS title "state of the caliphate."
Baghdadi appeared at Friday prayers at the Nuri mosque in 2014, soon after IS seized Iraq's second city, calling on Muslims to obey him.
Three years later, Baghdadi's fate and whereabouts remain unknown, and IS has lost much of the territory it overran in 2014.
The jihadists blew up the mosque and minaret on June 21 as they put up increasingly desperate resistance to the advance of Iraqi forces.
Officials from Iraq and the US-led anti-IS coalition said the destruction of the site was a sign of the jihadist group's imminent loss of Mosul, with Prime Minister Haider al-Abadi calling it an "official declaration of defeat".
The loss of the iconic 12th century minaret -- one of the country's most recognisable monuments sometimes referred to as Iraq's Tower of Pisa -- left the country in shock.
- Heritage destroyed -
But the destruction had been widely anticipated, with commanders saying IS would not have allowed Iraqi forces to score a hugely symbolic victory by recapturing the site.
IS claimed on its Amaq propaganda agency that the site was hit in a US air strike, but the US-led coalition said it was the jihadists who had "destroyed one of Mosul and Iraq's great treasures".
Russia has said it is seeking to verify whether the IS leader, whose whereabouts have been unknown for months, was killed when its warplanes hit the group's leaders in a night air raid in Syria last month.
The mosque in Mosul's Old City was the latest in a long list of priceless heritage and historical monuments destroyed by IS during its three-year rule over swathes of Iraq and Syria.
The minaret, which was completed in 1172 and had been listing for centuries, is featured on Iraq's 10,000-dinar banknote and was the main symbol of Iraq's second city -- giving its name to countless restaurants, companies and even sports clubs in Mosul.
After seizing Iraq's Sunni Arab heartland in June 2014, IS reportedly rigged the Hadba with explosives but was prevented from blowing it up by the local population. The jihadists consider the reverence of objects, including of such sites, as heresy.
The mosque's destruction came three days after government forces launched an assault on the Old City, the last district of Mosul still under IS control.
About 100,000 residents are believed to still be trapped in the district by IS, which has been using civilians as human shields to defend its last redoubt in Mosul.
The area still controlled by the jihadists is small but its narrow streets and the presence of so many civilians has made the operation perilous.
The jihadists have been offering fierce resistance in the Old City, with barrages of mortar fire and a huge number of booby traps slowing the Iraqi advance.