It was not invented by one person. The title was unofficially applied to the British politician Sir Robert Walpole (1676-1745) by his opponents when Walpole was the most powerful figure in the government.
Mr Prime Minister was created in 2005.
President: Mr Tony Tan Prime Minister: Mr Lee Hsien Loong
The current Prime Minister of Australia is Ms Julia Gillard and the Deputy Prime Minister is Mr Wayne Swan.
Prime Minister's XI was created in 1951.
Prime Minister's Department was created in 1957-07.
In the United Kingdom, "Prime Minister" is not an official title. Therefore the current Prime Minister, David Cameron, is "Mr David Cameron" and not "Prime Minister David Cameron."
FPS Chancellery of the Prime Minister was created in 2001.
Office of the Deputy Prime Minister was created in 2001.
My Dad's the Prime Minister was created on 2003-03-23.
Prime Minister's Prizes for Science was created in 2000.
The Prime Minister - film - was created on 1941-05-03.
Prime Minister's Strategy Unit was created in 2002.
Prime Minister's Literary Awards was created in 2007.