Portal:Belgium/Anniversaries/September/September 12
- 1858: birth of Fernand Khnopff, Symbolist painter
- 1920: closing ceremony of the 1920 Summer Olympics in Antwerp
- 1926: birth of Paul Janssen, pharmacologist, founder of Janssen Pharmaceutica
- 1985: birth of Jonatan Cerrada, singer, winner of the first A La Recherche De La Nouvelle Star, the French version of Pop Idol