You don't need to have a strong religious faith to appreciate the peaceful atmosphere of St Francis Xavier Cathedral. Inquire when the next mass is scheduled or when you can go for a wander through.
This Adelaide Central Business District principal church is an interesting spot to kick off your day of sightseeing. There's plenty to discover close by, like Adelaide Oval, Rundle Mall, and Adelaide Central Market. Take your time at St Francis Xavier Cathedral before making tracks to these other fine sights.