This page lists historical and other events on August 21st in Catalonia and the Catalan-speaking countries as well as a list of births and deaths of well-known Catalans.
1256 - Prince Jaume (Jaume II) is recognised as heir to the throne of the Kingdom of Mallorca.
1739 - València: Mariano Salvador Maella Pérez, Valencian neoclassical painter (died 1819).
1826 - Puigcerdà, Bisbat d'Urgell: Francesc Piguillem i Verdacer, doctor and professor of medicine.
1876 - Caldas de Besaya, Cantàbria: Ildefons Cerdà i Sunyer, Catalan engineer, urban planner, jurist, economist and politician (born 1815).