The Christ Church Cathedral in Dublin, Ireland, is the oldest standing church in the city. Over the years, it has changed hands, from Viking kings, to the Irish Church, to the Anglo-Normans, to the English after the Restoration. As the official seat of the Church of Ireland, it is busy with services and church activities, but is quite accessible for those who just want to peek inside this majestic building.
Today, the Dublin Castle in Ireland is a government building used for official ceremonies, dinners, presidential inaugurations, and other state affairs. Historically, however, it has had a varied past and was once called home by the Vikings, Normans, English, and British. Through most of its history, it has served as the administrative seat for English and British rule in Ireland. In 1922, it was finally handed back to the people of its country and has served them ever since.