Dublin Castle was until 1922 the fortified seat of British rule in Ireland, and is now a major Irish government complex. Most of it dates from the 18th century, though a castle has stood on the site since 1204.
Christ Church (or more formally, The Cathedral of the Holy Trinity) is situated in Dublin, Ireland, and is the elder of the capital city's two medieval cathedrals, the other being St. Patrick's Cathedral.
