The Union of the Centre of Catalonia was formed in March 1978 by the merger of a number of political parties supportive of establishing closer ties with the Union of the Democratic Centre: the Catalan Centre, the Union of the Christian Democrats of Catalonia–Jacques Maritain Club—a split from the Democratic Union of Catalonia (Unió)—the Party of the Catalan People, members from the League of Catalonia–Catalan Liberal Party and most of the Social Democratic Party of Catalonia.
