Cheap Hotels near Leinster House Dublin Leinster House in Dublin is the parliament building of the Republic of Ireland, also known locally as “The Dáil” (from Gaelic name “Dáil Eireann”). Designed by German architect Richard Cassells, Leinster House was originally built in 1745 as the residence of Anglo-Irish noble the Duke of Leinster. In 1800 it became the headquarters of the Dublin Royal Society, an organization to promote art, culture, industry and the sciences in Ireland. Leinster House was declared the parliament building of the Irish Free State in 1922. Public tours of Leinster are available in summer, when parliament is not in session. Leinster House also hosts a “Family Day” annually in June with music, face painting and other activities for all the family.
