Top activities in Dublin
Top Dublin landmarks
Top Dublin landmarks tickets
Top Dublin categories
Explore Dublin and beyond
Nearby Dublin tours
Popular tours in Ireland
People also visited
Trip Inspiration
Things to do in …
Top Dublin articles
Dublin Castle has served many functions since it was built by King John of England in 1230. Originally a defense center against Norman invaders and the seat of the English government, it has since also been the site of the Royal Mint and police headquarters. Today, the castle grounds attract visitors and function as a venue for Irish government functions and ceremonies.