Michael D Higgins rejects accusations of snub after declining to attend service with queen

Some 100 years ago TDs made the most important choice in the history of Irish State

‘We, who want a united Ireland, must do it by the powers of persuasion. We must make the case’

The negotiators believed Tyrone and Fermanagh would pass to the South

We have been dealing with the consequences of partition ever since

Allegations of secret dealings by Arthur Griffith are false, says biographer

The British team was skilled. It was not smart politics to leave our leading statesman at home

It was no accident but a process that provided a precedent for the rest of the empire

BBC Spotlight next week examines the legacy of partition and new opinion poll findings on attitudes to Irish unity

Demand for an early vote is further encouragement to those bent on creating mayhem

Ireland is still living with the consequences of the Government of Ireland Act

Northern Ireland requires deep economic and social change before any referendum

We are still living with the consequences of the Government of Ireland Act (1920)

State’s liberalisation has led to odd realignment in the North between DUP and some Catholics

Pools of blood, bodies left for days and looting - why has this painful period been forgotten?

British Pathé newsreel from 1924 depicts the ‘much debated Ulster Border’

Irish independence is problematic, but that should not prevent us from marking it

With the threat of a hard border looming, we look at how Northern Ireland came to this

Boundary Commission proposal to split Co Derry town in to three zones dropped

History inescapable on sinuous boundary between Monaghan and neighbours in North