One of the oldest buildings in Dublin, Christ Church Cathedral is located in the former medieval heart of the city. Founded in 1030 by Sitric, King of the Dublin Norsemen, the grand cathedral (also known as The Cathedral of the Holy Trinity) has long been a place of pilgrimage for Ireland's devout. Incorporated into the Irish Church in 1152, today it's the seat of both the Church of Ireland and Roman Catholic archbishops of Dublin.
Renowned for its design, on a one-hour tour you'll get to explore the interior, keeping a look out for its famous stained glass windows, the smaller chapels behind the main altar, and the secret underground floor. You'll get an insight into the history of the cathedral, and hear the strange tale of the mummified cat and rat. You'll visit the crypt — one of the largest and oldest in Britain and Ireland, and also get to have a go at ringing the bells of Christ Church Cathedral in the belfry.
Fifteen minutes' walk from Heuston rail station, Christ Church Cathedral is open 9am-5pm Monday to Saturday (till 7pm in summer), and from 12:30-2pm on Sunday (with extended hours in spring and summer). Last admission is 45 minutes before closing. Adult tickets cost €6; family tickets are available. Guided tours take place Monday-Friday every hour on the hour from 11am-4pm, and every hour on the hour from 2-4pm on Saturday.