The year that changed Irelandpublished at 12:58 British Summer Time 27 March 2016
Why was the fighting in Ireland so fierce, and what were the tensions at home and abroad? BBC iWonder looks at the year that changed Ireland.
Coverage of the commemorations in Dublin, marking 100 years of the Easter Rising.
Ciaran McCauley and Iain McDowell
Why was the fighting in Ireland so fierce, and what were the tensions at home and abroad? BBC iWonder looks at the year that changed Ireland.
The Irish Air Corps perform a flypast as the ceremony at the GPO concludes
As the Easter Rising centenary parade continues in Dublin, you can find out more about what happened 100 years ago at the Easter Rising on our special reports page.
A minutes silence is held after President Michael D Higgins lays a wreath outside the GPO
BBC News NI reporter Jayne McCormack has the latest from the Belfast Easter Rising commemoration parade.
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Thousands of people have been lining the streets of west Belfast and gathering at Milltown Cemetery for a parade marking the 100th anniversary of the Easter Rising.
Read MoreSix Pilatus PC-9M aircraft flown by the instructors of the Air Corps Flying Training School are flying in close Wedge Formation at 700 feet above O'Connell Street.
They trail smoke in the colours of the Irish national flag.
Among those at the commemoration ceremony at the GPO are former Irish presidents Mary McAleese and Mary Robinson; Martin McGuinness, Northern Ireland deputy first minister; former Taoiseach Bertie Ahern; and SDLP leader Colum Eastwood.
Irish president Michael D Higgins has a laid a wreath at the GPO, followed by a minute's silence and the playing of The Last Post.
Acting Taoiseach Enda Kenny says that we "honour the memory of those who died in 1916 with the respect and dignity that is their due".
The head chaplain of the Irish Defence Forces says a prayer of remembrance for the "the men, the women and the children of 1916".
"[Their] shortened lives and big dreams extended the horizons of our hopes," says Fr Seamus Madigan.
"As we reflect on our past, we thank you for all the courageous people of Ireland who dared to hope and dream of a brighter tomorrow for our country and all of its citizens."
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The 1916 proclamation is now being read in front of the General Post Office, while the Irish Republic flag, that was raised above the GPO by rebels 100 years ago, is flown above the building.
The Irish national flag is lowered to half mast as the commemoration event begins
Children representing the four provinces of Ireland are laying flowers at the entrance to the General Post Office - 10-year-old Tony O'Brien from Portglenone in County Antrim is representing Ulster.
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The view of the Easter Rising commemoration ceremony from BBC News NI reporter Kevin Sharkey.
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The commemoration event at the General Post Office in Dublin has begun. An Irish tricolour over the building has been lowered to half-mast.
The General Post Office on Dublin's O'Connell Street is the focus of today's Easter Rising commemorations.
It was the rebel headquarters 100 years ago, and later, when the parade arrives outside the building, the document that Pádraig Pearse used to declare a rebellion on Easter Monday 1916 will be read once again.
Irish president Michael D Higgins has arrived at the GPO ahead of today's commemoration event.