La Diada, the national holiday of Catalonia, remembers and commemorates a defeat. In the framework of the "war of Spanish succession" to choose a new king, Barcelona remained faithful to Charles II of Habsburg until the end and was submitted by the forces of Felipe de Anjou under the Duke of Berwick to a long site of 14 months until the city surrendered on September 11, 1714. The Bourbon victory in the war led to the abolition of Catalan institutions after the promulgation of the New Plant Decrees in 1716.
More than a century passed before commencing September 11 as an important day. The first celebration was in 1886, in a catholic and conservative environment in the parish of Santa Maria del Mar, where hundreds of fallen in that battle are buried in the Fosar de les Moreres.