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
St. Enda's School radical politics also made even some moderate supporters question what their children might be exposed to, and some, notably Eoin MacNeill, removed their children from Pearse's influence. As it turned out, a large number of St. Enda's pupils did join the Fianna Éireann, and even the IRB, fifteen of whom later took part in the Easter Rising in 1916. Following the execution of the Pearse brothers after the rising, their mother reopened St. Enda's back at Cullenwood House, which the closure of St. Ita's had vacated. Frank Burke, an ex-pupil who had served in the Rising, was headmaster. The school