Ibrahim Halawa's trial has been postponed for a 24th time as a rally takes place outside the Egyptian Embassy.
His family say his trial is due to take place again on the 4th of July which will be almost 4 years since he was locked up in a Cairo prison.
Amnesty International Ireland, USI and the Irish Congress of Trade Unions organised today's demonstration to highlight his continued detention.
The 21 year old Firhouse man was arrested during political protests in Cairo in August, 2013.
At the time, he was on a family holiday at the age of 17 and had just completed his Leaving Cert.
Amnesty International Ireland and human rights group Reprieve have criticised his detention and his family are growing increasingly concerned for his health.
Amnesty said in a statement: "Today’s hearing went ahead but witnesses who were called failed to appear. The court today agreed on a list of 18 witnesses who will be called at the next hearing. It is not envisaged that any further witnesses will be called by the prosecution when their testimony is completed. "