Wikipedia:Selected anniversaries/December 29
- 1170 – Archbishop of Canterbury Thomas Becket was slain in his own cathedral by four knights of Henry II of England.
- 1860 – To counter the French Navy's La Gloire, the world's first ironclad warship, the British Royal Navy launched the world's first iron-hulled armoured battleship, HMS Warrior.
- 1911 – Sun Yat-sen (pictured) was elected as the provisional President of the Republic of China by representatives from provinces in Nanjing.
- 1937 – The Constitution of Ireland, the founding legal document of the state known today as the Republic of Ireland, came into force.
- 1993 – The Tian Tan Buddha, the world's tallest outdoor bronze statue of the seated Buddha, was completed.
More anniversaries: