Iraqi forces have seized full control of Mosul University in their battle with so-called Islamic State, Iraqi state television said.
Military forces have been attempting to retake the city - the last major IS stronghold in Iraq - since October.
Iraqi officials said the IS group had used laboratories in the university complex to make chemical weapons.
The head of the country's counter-terrorism operations said retaking the area was a significant victory.
"This great scientific and cultural building was liberated by the heroes," Lt Gen Talib Shaghati, said. "The liberation of the University of Mosul means much, given its cultural, social and human symbolism."
Elite troops had entered the compound on Friday as part of a major push into new territory.