Celebrity Cruises is a 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.