Almost 1,500 people toured the Leinster House complex and No. 6 Harcourt Street on Saturday and Sunday, 19 and 20 January.
The tour of Leinster House featured special installations and theatrical performances telling the story of the First Dáil and 100 years of parliamentary democracy in Ireland.
No. 6 Harcourt Street, former headquarters of Sinn Féin, was also open to visitors. It was in No. 6 that the first public meeting of the Dáil was planned and where Ministers of the First Dáil Government, including Michael Collins, had their offices.
To find out more about the centenary of the First Dáil visit www.dail100.ie.
Image: Selfie booth in Leinster House 2000