A Prime Minister is the most senior minister of a cabinet in the executive branch of government in a parliamentary system. They are usually, but need not always be, a politician. In many systems the Prime Minister selects and can dismiss other members of the cabinet, and allocates posts to members within the Government. In most systems they are the presiding member and chairperson of the cabinet. In a minority of systems, notably in semi-presidential system of government, a prime minister is the official who is appointed to manage the civil service and execute the directives of the President.
In parliamentary systems like the Westminster system, the prime minister is the presiding head of the government while the position of head of state (the King, Queen, President, or Governor-General facto), who may officially be the head of the executive, is largely ceremonial. The Prime Minister is often, but not always, a member of parliament and is expected with other ministers to ensure the passage of bills through the legislature. In some monarchies the prime minister also exercises executive powers (known as the Royal Prerogative) which are constitutionally vested in the Crown and can be exercised without the approval of parliament.
As well as being Head of Government, a prime minister may have other roles or titles—the Prime Minister of the United Kingdom, for example, is also First Lord of the Treasury.Contrary to popular perception the two posts are separate and need not be held by the one person. The last prime minister not to be First Lord of the Treasury was Lord Salisbury at the turn of the 20th century. 10 Downing Street is actually the First Lord's residence, not the Prime Minister's. As Salisbury was not First Lord he had to live elsewhere as prime minister. Prime ministers may take other ministerial posts—for example during the Second World War Winston Churchill was also Minister of Defence (although there was then no Ministry of Defence).
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Prime Minister :: Departments and Agencies

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Canada Speaks - A collection of speeches by Canadian Prime Ministers. Includes speeches, in English and French, by Prime Ministers dating back to Confederation.
First Among Equals: Canadian Prime Ministers - Showcases Canada's prime ministers from their beginnings through their political careers and private lives. Features biographies, portraits, speeches and hundreds of photos, letters, caricatures and documents from the National Library and National Archives of Canada.
First Among Equals: Canadian Prime Ministers: Children's Site - Kid-friendly story of the role of the Prime Minister of Canada, with biographies, photos, games and classroom activities. From the National Library and National Archives of Canada.
National Program for the Grave Sites of Canadian Prime Ministers - Location map with directions of grave sites of Prime Ministers. Includes biographic information and links to other sites having related information.
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Premiers Ministres / Prime Ministers - Site includes biographies, pictures and speeches from each Prime Minister of Canada since 1867.
Meta Description: [ First Among Equals - Premier parmi ses pairs ]
Prime Ministers of Canada - Information at a glance. Includes photos.
Meta Description: [ Everything you wanted to know about Canada, Canadians, provinces, provincial federal government, the people, statistics and british columbia alberta, saskatchewan manitoba ontario quebec nova scotia new brunswick prince edward island newfoundland labrador yukon north west territories nunavut nort... ]
Prime Ministers of Canada - 1867 to Date - Lists all Canadian Prime Ministers, with links to biographical information, time in office and political affiliation.
Prime Ministers' Fonds - A database containing detailed correspondent, subject and chronological indexes to the papers of several Prime Ministers, from Library and Archives Canada.
The Prime Ministers of Canada - Presents brief biographies of all of Canada's prime ministers including commentary by leading historians, journalists, and political colleagues.
Meta Description: [ This site presents brief biographies of all of Canada's prime ministers including commentary by leading historians, journalists, and political colleagues. ]
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