The Catalan independence movement or the Catalan separatist movement (Catalan: independentisme català) is a political movement, derived from Catalan nationalism, which supports the independence of Catalonia or the Catalan countries from Spain and France. As a coastal territory of the Crown of Aragon, Catalonia has shared the monarch with Spain since the latter part of the 15th century, when Spain was born from the union of the Crown of Aragon and the Crown of Castile.