HISTORY & TIMELINE
29 December

A journey through
29 December in history

29 December has brought new states and new beginnings: Texas joined the United States, Ireland adopted its constitution and Guatemala ended a civil war of more than three decades. A physicist imagined machines built atom by atom. This timeline follows the date from medieval Canterbury to the end of the twentieth century.

JUMP THROUGH TIME
II
THE MIDDLE AGES

Medieval History

Kingdoms, conflict, faith, power and the changing medieval world.

1170
The murder of Thomas Becket, from an English manuscript of about 1200, the earliest known picture of the scene.The murder of Thomas Becket, from an English manuscript of about 1200, the earliest known picture of the scene.Image: Unknown authorUnknown author · Public domain
culture · Europe

Thomas Becket is murdered in Canterbury Cathedral

Thomas Becket had been Henry II’s chancellor and friend before the king made him Archbishop of Canterbury, but the two men fell out bitterly over the rights of the Church. In late 1170 Becket excommunicated the bishops who had crowned Henry’s eldest son in his place. On 29 December four knights of the king’s household, Reginald FitzUrse, Hugh de Morville, William de Tracy and Richard Brito, followed Becket into his cathedral at dusk and cut him down with their swords. The murder horrified Europe. Becket was made a saint within three years, Henry did public penance at his tomb, and Canterbury became one of the great pilgrim shrines of the Middle Ages.

Source: British Museum: Thomas Becket, the murder that shook the Middle Ages ↗
IV
THE NINETEENTH CENTURY

The 1800s

Industry, empire, invention, reform and a century of enormous transformation.

1845
An 1845 newspaper map opposing annexation, which labels Texas a 'slave district'.An 1845 newspaper map opposing annexation, which labels Texas a ‘slave district’.Image: Unknown authorUnknown author · Public domain
politics · Americas

Texas becomes the 28th state

Nine years after winning independence from Mexico, the Republic of Texas joined the United States when President James K. Polk signed the act of admission on 29 December 1845. Opponents in the North saw annexation as a way to add a large new slave state, and the dispute with Mexico over its border led to the Mexican-American War the following spring.

Source: Texas State Library and Archives Commission: annexation process 1836-1845, a summary timeline ↗
1890
The entrance to the cemetery at Wounded Knee, South Dakota, where the victims were buried; the monument stands at the centre.The entrance to the cemetery at Wounded Knee, South Dakota, where the victims were buried; the monument stands at the centre.Image: SharonPapierdreams · CC BY-SA 4.0
world · Americas

The massacre at Wounded Knee

In December 1890, after the killing of Sitting Bull, the Miniconjou Lakota chief Big Foot (Spotted Elk) led his people towards the Pine Ridge reservation in South Dakota. Troops of the US 7th Cavalry stopped them and camped around them by Wounded Knee Creek. On the morning of 29 December, as the soldiers disarmed the Lakota men, a shot went off in a scuffle and the troops opened fire, supported by rapid-firing Hotchkiss guns on a hill. Between about 150 and 300 Lakota were killed, nearly half of them women and children. It is often seen as the end of the wars on the Plains.

Source: Encyclopaedia Britannica: Wounded Knee Massacre ↗
V
THE TWENTIETH CENTURY

The 1900s

War and peace, technological leaps, social change, politics, sport and popular culture.

1911
The Winter Palace of the Bogd Khan in Ulaanbaatar, now a museum.The Winter Palace of the Bogd Khan in Ulaanbaatar, now a museum.Image: Bernard Gagnon · CC0
politics · Asia

Mongolia declares its independence

As revolution broke out in China against the Qing dynasty, Mongol nobles and lamas in Urga (today’s Ulaanbaatar) expelled the Manchu governor and, on 29 December 1911, enthroned the Eighth Jebtsundamba Khutughtu, the head of Mongolian Buddhism, as the Bogd Khan, the ‘Holy King’ of an independent Mongolia. Full independence was not secured at once: Russia and China agreed in 1913 that Mongolia would be self-governing but under Chinese suzerainty, and it took the revolution of 1921 to settle it. Mongolia marks 29 December as its National Freedom and Independence Day.

Source: Encyclopaedia Britannica: Mongolia, independence and revolution ↗
1937
Éamon de Valera, who drafted the 1937 constitution.Éamon de Valera, who drafted the 1937 constitution.Image: National Photo Company Collection · Public domain
politics · Europe

Ireland’s constitution comes into force

Bunreacht na hÉireann, the Constitution of Ireland drafted under Éamon de Valera and approved by referendum on 1 July 1937, came into operation on 29 December 1937. It replaced the Irish Free State set up by the treaty with Britain in 1922 with a state called Éire, or Ireland, with its own elected president. It remains in force, amended by many referendums since.

Source: Irish Statute Book: Constitution of Ireland ↗
1959
Richard Feynman at Caltech, from the February 1960 issue of Engineering and Science, which published his talk.Richard Feynman at Caltech, from the February 1960 issue of Engineering and Science, which published his talk.Image: Unknown · Public domain
science · Americas

Feynman sees ‘plenty of room at the bottom’

After dinner at the American Physical Society’s meeting at Caltech on 29 December 1959, Richard Feynman gave a talk called ‘There’s Plenty of Room at the Bottom’. He asked why the whole Encyclopaedia Britannica could not be written on the head of a pin, and imagined machines and computers built on the scale of atoms. He offered a $1,000 prize for a working electric motor less than a sixty-fourth of an inch across, which was won within a year. The talk is often seen as the starting point of nanotechnology.

Source: Caltech Library: There’s Plenty of Room at the Bottom ↗
1989
politics · Europe

Václav Havel becomes president of Czechoslovakia

Six weeks after the Velvet Revolution began, the Federal Assembly in Prague, still made up of deputies chosen under communist rule, elected the playwright Václav Havel president of Czechoslovakia on 29 December 1989. Only months before he had been in prison for his work as a dissident. He was the country’s first non-communist head of state since 1948. He led Czechoslovakia to free elections in 1990 and, after its peaceful split in 1993, served ten years as president of the Czech Republic.

Source: Prague Castle, Office of the President: Václav Havel ↗
1996
The National Palace of Culture in Guatemala City, where the peace agreement was signed.The National Palace of Culture in Guatemala City, where the peace agreement was signed.Image: K21edgo · CC BY-SA 3.0
politics · Americas

Guatemala signs a firm and lasting peace

At the National Palace in Guatemala City on 29 December 1996, the government and the guerrilla alliance URNG signed the Agreement on a Firm and Lasting Peace, after talks moderated by the United Nations. It ended more than three decades of civil war, which had cost more than 200,000 lives, most of them Maya civilians. A UN-backed truth commission reported in 1999.

Source: United Nations: the UN and the Guatemala peace process ↗
WHY THESE MOMENTS?

Significance before volume

This page is not the longest possible list of events. It is a chronological journey through 29 December, where each entry is chosen for historical significance, human interest and reliability.

Facts are checked against authoritative museums, archives, universities and reference works. Where sources disagree, the page says so.

EXPLORED THE DEEPER STORY?

Return to the highlights of 29 December

Discover the lighter side of the date with famous birthdays, culture, firsts and lives remembered.

Explore This Day →