Certificated
LAMPA DESIGN HOTEL
LE MARDE HOTEL
LEVNİ HOTEL
LEVNİ PLUS HOTEL
MEGA RESIDENCE
MERCURE SİRKECİ HOTEL
MERİT HALKİ PALACE HOTEL
MİNA HOTEL
OTTOMAN HOTEL IMPERIAL
OTTOMAN PARK HOTEL
PALAZZO DONIZETTI HOTEL
PERA PALACE HOTEL
PETROS HOTEL
PIERRE LOTI
REGIE OTTOMAN İSTANBUL
SEVEN HILLS HOTEL
SPLENDID HOTEL
SULTANAHMET SARAYI
SULTANHAN HOTEL
SUMAHAN ON THE WATER
TAN HOTEL
THE CENTRAL PALACE HOTEL
THE ELYSIUM İSTANBUL
THE SOFA HOTEL
