Built on the ruins of the Roman temple to Aesculapius, the Graeco-Roman god of medicine, the island’s 10th-century church is an interesting hybrid of architectural styles: the facade is baroque, as is the richly frescoed ceiling; the belltower is 12th-century Romanesque, and the 28 columns that divide the interior date to ancient times.
Inside, a marble wellhead is thought to stand over the spring that provided the temple’s healing waters.
