The first woman prime minister and certainly one to remember, Margaret Hilda Thatcher was also the longest-serving prime minister of the 20th century. She was sworn into office on the 4th of May, 1979 and continued to serve a lengthy term throughout the 80s until she stepped down on the 28th of November, 1990. While her policies tended to be often polarising and controversial, her legacy as an inspiring, legendary figure in British politics is undebatable. In an environment dominated by men, she rose to prominence as the leadership candidate of the Conservative Party during the 1979 General Election, and exceeded all expectations of the Press and the public that a female prime minister would never be accepted. Following her retirement from politics, she was made Baroness Thatcher and rewarded a permanent seat on the House of Lords. She died on the 8th of April, 2013.