Royal Caribbean International (RCI), previously known as Royal Caribbean Cruise Line (RCCL), is a cruise line brand founded in 1968 in Norway and organised as a wholly owned subsidiary of Royal Caribbean Cruises Ltd. (RCCL) since 1997. Based in Miami, Florida, United States, it is the largest cruise line by revenue and second largest by passengers counts. In 2018, Royal Caribbean International controlled 19.2% of the worldwide cruise market by passengers and 14.0% by revenue. It also operates many of the world's largest ships; as of July 2019, the line operates twenty-six ships, including the four largest cruise ships in the world, and has six additional ships on order.