The case against the Muslim Broherhood Supreme Guide, Mohamed Badie, his deputy leader Khairat El-Shater and 15 others was on Saturday adjourned until 30 August.
In the so-called 'Supreme Bureau' case, the defendants are accused of killing, inciting killing and violence, owning weapons and belonging to an armed group.
Violent clashes erupted in June of last year in front of the Muslim Brotherhood headquarters in Cairo's Moqattam district between Brotherhood members and opponents. The violence left nine killed and tens injured.
Since the ouster of president Mohamed Morsi -- a member of the Brotherhood -- last July, thousands of his loyalists and members of his group have been arrested and face various charges including the killing of opponents.
Brotherhood Supreme Guide Badie already faces the death sentence in other cases.