Events in the year 1973 in Belgium.
Incumbents Monarch: Baudouin Prime Minister: Gaston Eyskens (to 26 January); Edmond Leburton (from 26 January)
Births 20 January – Queen Mathilde of Belgium 12 August – Vanessa Matz, politician
Deaths 25 October – Émile Masson (born 1888), cyclist
Publications 11 November – Les Cahiers du GRIF is established by Françoise Collin
References