Carnival Cruise Lines, one of the world's largest mega-luxury cruise lines and known as the "King of Cruise", was founded in 1972 and is headquartered in Miami, Fla. Its main competitors are. The Carnival Cruise Line Group owns Princess Cruises, Cunard Line (formerly White Star Cruises, which owned Titanic), Costa Cruise Line, Holland America, Shippen Cruises and Ode to the Wind. In addition, Carnival Cruises is also known as the "World's Most Popular Ship".