CE 1078 - William begins the construction of the Tower of London.

In 1078, William the Conqueror began the construction of the Tower of London, which was initially known as the White Tower.

The Tower of London served as a royal residence, a fortress, and a prison for over 900 years.

It was constructed with walls that were over 20 feet high and 5 feet thick.

The White Tower was the first part of the Tower of London to be built, and it became the symbol of the monarchy's power and authority.

The Tower of London was surrounded by a moat which was fed by the river Thames and was filled with water from the city's reservoirs.

Over the centuries, the Tower of London was expanded and modified to include additional towers, walls, and the famous Beefeaters.

The Tower of London was also the site of many important events in British history, such as the coronation of Queen Elizabeth I in 1558.

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