Family, friends and supporters of Ibrahim Halawa are today marking the fourth anniversary of his imprisonment in Egypt.
The Dubliner was arrested as a 17 year old following a protest in Cairo in 2013.
His long-running mass trial is continuing in Cairo, but it is feared it may not conclude for some months.
Amnesty International says his detention is a violation of Egyptian and international law, and the organisation is holding a lunchtime protest at the Egyptian embassy in Dublin today.
Foreign Affairs Minister Simon Coveney says he is sending a personal message to Ibrahim, promising the Government is doing everything possible to ensure he can return home as soon as possible.