Catalan nationalism is the ideology asserting that the Catalans are a distinct nation. A related term is Catalanism, which tends to have a wider meaning, as some people define themselves as Catalanist but not Catalan nationalist.

The Bases for the Catalan Regional Constitution, better known as the Manresa Bases, is the document presented as a draft Catalan regional constitution for a paper by the Unió Catalanista to the council of representatives of Catalanist associations, which met in Manresa (Barcelona) on 25 and 27 March 1892 at the initiative of the Lliga de Catalunya. The Bases de Manresa are often considered to be the "birth certificate of political Catalanism", at least that of conservative roots.