St. Patrick's Cathedral is the National Cathedral of Ireland, located in the heart of Dublin.
Lore has it that St. Patrick passed through Dublin on his journeys, and at a well close to where the cathedral now stands, baptized pagans into Christianity. (You can see a spot on the church grounds showing the approximate location of that well.) To commemorate his visit, at the time, a small wooden church was built on that site.
In 1191, this church was elevated to the status of cathedral, and the current cathedral building was built between 1200 and 1270. Age, religious reformation, and the elements took their toll on the building, and in the late 1800's, a full-scale restoration was carried out on the cathedral by the Guinness family. The cathedral was so lovingly restored that it is hard to believe it ever fell into disrepair.
St Patrick's is both an active church and a living museum to the history of Ireland. Many notable Irish historical figures are either buried here (ie, Jonathan Swift lies near the entrance) or commemorated here (such as Carolan, the last of the Irish bards). The choir, which was founded in 1432, had the first performance of Handel's Messiah in 1742. St. Patrick's was also the site of the first University in Ireland.
It is interesting to note that there are two cathedrals in Dublin, which is rather unusual – most cities only have one major cathedral. While exact records have been lost to time, it’s believed that when St. Patrick's was granted cathedral status, it was intended to replace nearby Christ Church Cathedral. That never quite worked out, both cathedrals remained active, and eventually St. Patrick's was named the nation's cathedral while Christ Church is the city’s cathedral.
St. Patrick's is open year-round to visitors (admission is under €5 for adults) except for certain holy days such as Christmas and Christmas Eve. Additionally, non-worship visitors are restricted from wandering the cathedral during certain services, so it is advisable to check their web site for current hours.
Although there are tours available, visitors are allowed to wander on their own through the building.