急!请用英语介绍Tower of London

The Tower of London, seen from the River Thames, with a view of the water gate called "Traitors' Gate."The Tower of London is a dominating landmark in central London—in the London Borough of Tower Hamlets— on the eastern border of the City of London, beside the northern bank of the River Thames.

It is often identified with the White Tower, the original stark, square fortress built here by William the Conqueror in 1078. It can be seen, however, as a complex of several buildings set within the outer defensive walls and moat.

The Tower's primary function was as a fortress, a royal palace and a prison (particularly for high status and royal prisoners, such as the Princes in the Tower and the future Queen Elizabeth I). This last use has led to the phrase "sent to the Tower" meaning "imprisoned". It has also served as a place of execution and torture, an armory, a treasury, a zoo, a mint, a public records office, and an observato