This 19th-century Byzantine-style church is unexpectedly (perhaps dubiously) one of the city’s most romantic spots, as it holds the relics of St. Valentine. The pieces of bone are believed to be authentic; they were given to the church by Pope Gregory XVI in 1836. They’re kept in a casket on an altar to the right of the main altar, but once a year (on St. Valentine’s Day, of course), they are carried out in procession for a special Mass. The church also holds an icon known as Our Lady of Dublin, a 15th-century woodcarving that, in 1824, was rescued from a nearby farm where it had been used as a pig trough.