A graceful Gothic tower rises from this 15th-century church, its delicate stonework looking almost like filigree. Along with the castle keep, this is one of the few remnants of medieval Cardiff. A church has stood on this site since at least 1180. Inside there are regimental flags, elegant pointed arches and a spectacular Elizabethan-era tomb. Free half-hour organ concerts are held here at 1.15pm on the second Friday of each month.