No, there isn’t a pro and amateur league for cathedrals in Ireland—[“]pro” simply means “temporary.” And therein lies a fascinating piece of historical trivia. Contrary to popular belief, Dublin has no Roman Catholic cathedral (St. Patrick’s and Christ Church have been part of the Anglican Church of Ireland since the 16th century.) But the Vatican views Christ Church as Dublin’s “true” Catholic cathedral. Therefore, St. Mary’s has been designated the “temporary” official Catholic cathedral in Dublin…since 1820. Tucked away on a rather unimpressive back street, it’s nonetheless the heart of the city’s Northside. It was built between 1815 and 1825 in Greek Revival Doric style, with an exterior portico modeled on the Temple of Theseus in Athens, with six Doric columns. The Renaissance-style interior is patterned after the Church of Saint-Philippe du Roule of Paris. The church is noted for its awe-inspiring Palestrina Choir, which sings a Latin Mass Sundays at 11am during school terms.