This page lists historical and other events on September 12th in Catalonia and the Catalan-speaking countries as well as a list of births and deaths of well-known Catalans.
1213 - Muret, Llenguadoc, Occitània - the Battle of Muret between the Catalano-Occitan troops led by Pere the Catholic and the French crusaders led by Simon de Montfort.
1229 - Calvià, Mallorca - the Catalan troops led by Jaume I beat the Saracens at the Battle of Portopí on the hill of Sa Batalla. This is the start of the Conquest of Mallorca.
1843 - Xàtiva, Costera - Matilde Ridocci i Garcia, Valencian teacher and writer (died 1922).
1846 - Les Cabanyes, Alt Penedès - Josep Torras i Bages, Catalan clergyman and writer.
1213 - Muret, Llenguadoc, Occitània - Pere I the Catholic, Count of Barcelona, dies from sword wounds received at the Battle of Muret.
1979 - Madrid - Laly Soldevila, Catalan actress.
1984 - Tiana, Maresme - Lola Anglada, Catalan writer and illustrator.