Nathan Zwally / Shutterstock
Europe / Ireland / County Limerick / Best Attractions

St. Mary's Cathedral

This cathedral sits on a site that was originally a palace belonging to one of the kings of Munster, Donal Mor O'Brien, who donated the land to the church in 1172. The current building is much newer than that, but still contains a 12th-century Romanesque doorway, a pre-Reformation stone altar, and a huge stone slab said to be the coffin lid of Donal Mor O'Brien's grave. It has quirky features like the Leper's Wall (a wall opening from the medieval times) and "mercy seats" from the 15th century, which allowed clergy to rest while standing. It has countless small chapels and stained glass windows, but just stepping through the doors gives you the feel of ancient history.