The Castle is the heart of historic Dublin and is one of the most important buildings in Irish history.
It is assumed that the original fortification was an ancient fort later converted into a Viking fortress.
From 1204 to 1922 it was the seat of English and then British rule in Ireland.
After the fire of 1684 destroyed much of the Medieval Castle, the State Apartments were built as residential quarters of the court.
One of the most important rooms of the Castle is the Throne Room: here is preserved the throne of William of Orange where each new president of the Republic is elected.
Now Dublin Castle is the venue for official state visits, state functions, exhibitions, and other events.