Sister Parish was the grande dame of American twentieth-century decorators and is credited with developing the style of interior decoration known as 'American Country Style'. Parish-Hadley, the decorating firm she founded and ran with her business partner, Albert Hadley, was extremely successful and it produced a huge body of work, but Sister's most famous client was Jacqueline Kennedy, for whom she worked at the White House and at Glen Ora, a presidential retreat in Virginia.