St. Mary's Cathedral Killarney, is a Roman Catholic Cathedral in Killarney. Co Kerry and is a majestic setting for your wedding ceremony. Located nestled in Killarney National Park, it is a mere 5 minute drive from the Great Southern and proves as a very popular choice for locals and visitors alike. The idea for St. Mary's Cathedral first came about in 1840 and after some delays opened in 1853. St. Mary's Cathedral is famed for its long aisle