You: When did people begin to build it?
Jenny: They began to build it between 1078 and 1087.
You: When was it finished?
Jenny: It was slowly finished after 1100.
You: What is it called now?
Jenny:This tower was called the Tower of Power but now it's called the White Tower.
You: Why is it called the White Tower?
Jenny: Because in 1240 King Henry III wanted to make the Great Tower white inside and outside.
You: Why was it built?
Jenny:The White Tower was to serve as an impregnable Royal residence.