Dublin Castle, located off Dame Street, was until 1922 the seat of the United Kingdom government's administration in Ireland, and is now a major Irish government complex.                         

Dublin Castle hosts the Heineken Green Energy festival each May bank holiday weekend.

Since its foundation in 1204 Dublin Castle has been at the heart of the history and evolution of the city. 

Today, spanning an area of over 44,000 square meters (11 acres), the site contains 2 museums, 2 cafés, an international conference centre, 2 gardens, Government Buildings and the State Apartments which are the most important state rooms in the country.

The grounds of the site are free to explore, as is the Chester Beatty Library and the Revenue Museum.

The State Apartments can only be accessed via guided tour.