Portal:Belgium/Anniversaries/December/December 23
- 679: death of Dagobert II, King of Austrasia
- 1862: birth of Henri Pirenne (pictured), historian
- 1883: birth of Hubert Pierlot, Prime Minister of Belgium between 1939 and 1945, for the largest part leading a government in exile during World War II
- 1910: foundation of Boy Scouts of Belgium