This is a joy for anyone interested in archaeology or history. Dublin Castle was built in the 13th century on top of the foundations of a Viking structure.
The castle served as a military fortress, prison, court of law and the core of British administration in Ireland until 1922.
It's now used for state functions and government conferences. Guided tours are available.
Open Monday to Friday 10am-4.50pm; Saturday, Sunday and holidays 2-4.50pm.
Closed during state functions. Admission is €4.50. Phone 677 7129 or 677 7270.