Designed by William Robinson in 1697, this is the most important church to survive from that period (although it’s no longer in use and is closed to the public). John Wesley, founder of Methodism, delivered his first Irish sermon here in 1747 and it was the preferred church of Dublin’s 18th-century social elite. Many famous Dubliners were baptised in its font, and Arthur Guinness was married here in 1793.