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Margaret Thatcher changed the face of modern British politics.
She started her political career at Oxford University where she was president of the Conservative Association. She later ran for parliament to represent Dartford, but she lost out twice to her Labour rival.
In 1959, though, she won the parliamentary seat in Finchley and became Margaret Thatcher MP.
But she really made history in 1975 when she became leader of - one of the two major political parties in the UK - and later, in 1979, the first female British Prime Minister.
She had some pretty radical views and even earned herself the nickname the Iron lady. She was forced to quit in 1990, but not before she'd become the longest continuously serving prime minister of the 20th century.
As with most political figures, some people loved her, while others didn't. Some thought she saved Britain when it was having many economic problems. Others thought she ruined the lives of millions of workers.
Whatever people think, there's no question that her strong-mindedness certainly meant she .
What did she do: She was the longest-serving British prime minister of the 20th century and the first woman to hold that office. A Soviet journalist dubbed her the "Iron Lady", a nickname that became associated with her uncompromising politics and leadership style.
