Celebrity Cruises is a premium cruise line which was founded in 1988 by the Greece-based Chandris Group. In 1997, Celebrity Cruises Ltd. merged with Royal Caribbean International to become Royal Caribbean Cruises Ltd., which operates Celebrity, Royal Caribbean International, Azamara Club Cruises, Pullmantur Cruises and CDF Croisières de France. The signature “Χ” displayed on the funnel of Celebrity ships is the Greek letter chi, for “Chandris”. The company has its headquarters in Miami, Florida. Common features on board Celebrity brand ships feature aft-glass dining rooms, formal foyer areas, alternate dining venues, balcony and suite staterooms, pools and lounging areas, bars and lounges, libraries, spas and gyms, and relaxation areas.