- 11 December 1949 – The Číhošť miracle takes place: during a church service of Josef Toufar in the village of Číhošť, the crucifix moves several times over the pulpit, prompting an intervention by the StB
- 15 December 1230 – Wenceslaus I succeeds Ottokar I as King of Bohemia
- 16 December 1992 – The Czech National Council adopts the Constitution of the Czech Republic
- 18 December 1935 – Edvard Beneš is elected second President of Czechoslovakia
- 22 December 1966 – Construction begins on the Stalin Monument (pictured), the largest representation of Stalin in the world