Prime Minister of the U.K. Margaret Thatcher in June 1989.
A staple of the 1980s, the power suit was defined by a blazer replete with shoulder pads and a matching skirt or trousers. From Melanie Griffith in Working Girl to British Prime Minister Margaret Thatcher, women who were rising in the workforce favored this female version of the traditional male suit. The stiff silhouette implied by the strong, wide shoulders seemed designed to de-emphasize the feminine form, and has since fallen out of fashion.