Santo Maris Oia Luxury Suites & Spa Becomes First Hellenic Chamber of Hotels “Boutique Hotel” 2018-03-09 by Argophilia Travel News Santo Maris Oia Luxury Suites & Spa is now the first officially certified “Boutique Hotel” in Greece, based on the demanding standards of the “Boutique Hotel” classification inaugurated by the Hellenic Chamber of Hotels.