The three isled Basilica , that has been the island's Cathedral since 1841, replaced an earlier church in the same place. It has been altered in- and outside. Among the numerous icons adorning it, those of M. Damaskinos (16th c.), Emm. Tzanne (17th c.)and Paramythiotis (18th c.)stand out, whereas the two-sided icon of Virgin Mary Dimosiana is the oldest (15th c.) and most important of all.