Tucked into a corner of the walled town sits the 6th-century Visigothic cathedral, surrounded by a jigsaw puzzle of scattered archaeological remains. The church has undergone heavy restoration, but its early roots are evident everywhere: foundation stones bearing Latin inscriptions, Moorish brick arches, salvaged Roman columns and Visigothic elements such as the baptistry visible through glass near the entrance. Of the frescos within, the best preserved features São Bartolomeu with a demon at his feet.
