Football is the most important sport in Catalonia and was introduced in the late 19th century by a combination of mostly British immigrant workers and visiting sailors, and students returning from Britain. Catalonia led the way in the development of football in Spain, organizing both the first association and the first championship. Today football in Catalonia is organized by the Catalan Football Federation and the RFEF and teams from Catalonia compete in La Liga, the Copa del Rey, the Copa Catalunya and several European competitions.