Timeline
Feb 1939
Hubert Pierlot I, II, III, IV, V & VI
1939-02-22 to 1945-02-12
May 1938
Paul-Henri Spaak I
1938-05-15 to 1939-02-22
Nov 1937
Paul-Emile Janson
1937-11-24 to 1938-05-15
Mar 1935
Paul van Zeeland I & II
1935-03-25 to 1937-11-24
Nov 1934
Georges Theunis II
1934-11-20 to 1935-03-25
Oct 1932
Charles de Broqueville II
1932-10-22 to 1934-11-20
Jun 1931
Jules Renkin
1931-06-06 to 1932-10-22
May 1926
Henri Jaspar I & II
1926-05-20 to 1931-06-06
Jun 1925
Prosper Poullet
1925-06-17 to 1926-05-20
May 1925
Aloys Van de Vyvere
1925-05-13 to 1925-06-17
Dec 1921
Georges Theunis I
1921-12-16 to 1925-05-13
Nov 1920
Henri Carton de Wiart
1920-11-20 to 1921-12-16
Nov 1918
Léon Delacroix
1918-11-21 to 1920-11-20
Jun 1918
Gerard Cooreman
1918-06-01 to 1918-11-21
Jun 1911
Charles de Broqueville I
1911-06-17 to 1918-06-01