An Egyptian military court sentenced 144 supporters of former Islamist president Mohamed Morsi to prison, with sentences ranging from 15 to 25 years in jail.
The case dates back to August 2013, when hundreds of Morsi supporters protested the violent dispersal of the Rabaa El-Adaweya sit-in in downtown Cairo.
The prosecution accused the defendants of attempting to storm the El-Fatah Mosque and El-Azbakiya police station.
Today's verdict is subject to appeal.
Egypt's 2014 constitution gives the military the right to try civilians in criminal offences related to attacks on vital instititutions.
In 2014, then-interim president Adly Mansour signed amendments to the military criminal code granting for the first time the right of defendants to appeal military court sentences.