An ancient church in the heart of the Viking & Medieval district of Dublin, Christchurch Cathedral is a beautiful and characteristic building in Gothic / Romanesque style with an interior mix of medieval and Victorian pastiche. There are many attractions to this cathedral beyond it's strikingly beautiful appearance such as the reputed tomb of Strongbow, the largest crypt in the Irish or British isles, old secular carvings, medieval carved statues, punishment stocks from 1670 and a mummified Cat & Rat among many other interesting and fascinating things.
Guided tours are €6 and include access to the Belfry tower from where you can experience unique views of Dublin, learn about the bell ringers and even learn how to ring the bells of Christchurch Cathedral yourself under the guidance of an expert. Christchurch Cathedral is of course a stop on the free tour of Dublin as recommended by

Learn more about Christchurch Cathedral on one of these tours: Free Tour of Dublin, Tour Leyendas y Misterios de Dublín en Español, The Best of Dublin