President Michael D Higgins will lead tributes later to the leaders of the 1916 Easter Rising.
A state commemoration takes place each year in Arbour Hill, the final resting place of the seven signatories of the Proclamation of the Republic.
This year the event will take place in two locations, with a significant portion in Áras an Uachtaráin.
The commemoration will get under way when President Higgins rings the Peace Bell followed by a wreath laying ceremony.
Endeavour Awards Recognise Those Making Bray Special
Business Leaders & Personalities Gather To Outline Temporary Alternative To Push Cliff Walk Reopening
Beyond The Pale Pre-Sale Tickets Go Live As Wicklow's 'Boutique' Festival Reveals Headliners
Relief For Coast Guard As Sod Turning Event Marks Some Movement Towards New Station In Greystones
Wicklow Wexford TD Says Mercosur Deal Would Signal ''Death-Knell'' For Irish Agriculture