Tourism in the Republic of Ireland on were built by them. As Dublin Airport is located just outside the city, most international visitors to Ireland begin their stay here. Among the main attractions in Dublin are Dublin Castle, the seat of British rule in Ireland until 1922, Phoenix Park, one of the largest inner city parks in the world, The General Post Office, one of Ireland's most famous buildings due to the 1916 Easter rising, Kilmainham Gaol, a former prison turned museum that held and executed the rebels of the 1916 Rising and Trinity College, where the Book of Kells and the Book of Durrow are
Centenary of the Easter Rising Dublin Society and met relatives of the dead, 4,000 of whom attended. President Higgins later attended a 1916 commemoration concert at Liberty Hall Theatre. On the same day, Acting Taoiseach Enda Kenny and Acting Arts Minister Heather Humphreys opened a permanent visitor centre at the General Post Office, scene of rebel occupation in 1916. Also attending was former Taoiseach Liam Cosgrave, whose father W. T. Cosgrave reopened the building in 1929 after it was put back together. A commemorative service was held at the Unitarian Church on St Stephen's Green, with the names of all Dublin fatalities read aloud. The