President Michael D Higgins attended the annual Remembrance Day service at St Patrick's Cathedral in Dublin this afternoon.
It was his first official engagement since those on his inauguration day on Friday.
The President laid a laurel wreath in remembrance of those who gave their lives in both of the world wars at the service.
Britain’s Queen Elizabeth laid a wreath at the Cenotaph in London this morning as part of Remembrance Sunday events there.
One of the biggest events was in Belfast where the Royal British Legion created a Field of Remembrance in the grounds of Belfast City Hall.
Northern Ireland First Minister Peter Robinson and Secretary of State Owen Paterson were among those who attended the wreath-laying service.
New SDLP leader Alasdair McDonnell also attended, although his decision not to wear a poppy caused some controversy.
His predecessor Margaret Ritchie was the first nationalist leader in Northern Ireland to wear the symbol when she attended the service last year.
A two-minute silence was observed at 11am.
President Higgins travelled to Derry to present the winning trophy to the All Island School Choir of the Year, Wesley College.