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Millennium: 2nd millennium
Centuries: 11th century12th century13th century
Decades: 1140s  1150s  1160s  – 1170s –  1180s  1190s  1200s
Years: 1170 1171 117211731174 1175 1176

The year 1173 was a time of important events across the world. From the start of a famous tower's construction in Italy to royal family conflicts in England, many things happened. This year also saw changes in religious groups and new ways of writing down chess moves.

What Happened in 1173?

Important People and Events

In 1173, Saint Thomas Becket was officially recognized as a saint. This process is called Canonization. Thomas Becket was an important church leader who had been killed a few years earlier. He was buried in Canterbury, England.

A big family disagreement happened in England. Eleanor of Aquitaine and her sons started a rebellion against her husband, Henry II of England. This conflict is known as the Revolt of 1173–1174. It was a major challenge to the king's power.

In Poland, a new ruler took the throne. The reign of Boleslaus IV of Poland ended, and Casimir II of Poland became the new leader. This was an important change for the country.

New Beginnings and Changes

A man named Peter Waldo became a Christian in a new way. He then started a religious group known as the Waldensians. This group believed in living a simple life and following the teachings of the Bible very closely.

In China, the Emperor Xiaozong saw the end of one period, called the Qiandao era. A new period, the Chunxi era, then began under his rule. These eras were ways of marking time during an emperor's reign.

Chess players also saw a new development in 1173. This year marks the first time that algebraic chess notation was recorded. This is a special way of writing down chess moves using letters and numbers, making it easier to record and share games.

Building the Leaning Tower

On August 9, 1173, construction began on a very famous building in Italy. This was the start of the Leaning Tower of Pisa. It was designed to be a bell tower for the city's cathedral. However, the ground it was built on was too soft, and the tower soon began to lean!

Conflicts and Castles

In Wales, the castle at Abergavenny was taken over by Welsh forces. This was part of the ongoing conflicts between the Welsh and the Norman lords who had built castles in their land.

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