The National Day of Catalonia (Catalan: Diada Nacional de Catalunya [diˈaðə nəsiuˈnaɫ də kətəˈɫuɲə]) is a day-long festival in Catalonia and one of its official national symbols. It commemorates the defeat of Catalonia during the War of the Spanish Succession. The Catalan troops that initially fought in support of the Habsburg dynasty's claim to the Spanish throne were finally defeated at the Siege of Barcelona by the army of the Bourbon king Philip V of Spain on 11 September 1714 after 14 months of siege. That meant the loss of the Catalan constitutions under the aegis of the Nueva Planta decrees.The holiday was first celebrated on 11 September 1886, was suppressed by the Franco dictatorship in 1939 and reinstated in 1980 by the autonomous government of Catalonia, the Generalitat de Catal